Darwin from Insectivorous Plants to Worms

Between 1873 and 1882, the life and work of Charles Darwin from ''Insectivorous Plants'' to ''Worms'' continued with investigations into carnivorous and climbing plants that had begun with his previous work. Worries about family illnesses contributed to his interest in Galton's ideas of "hereditary improvement" (which would later be called Eugenics). He continued to help with the work of Downe parish church and associated village amenities, despite problems with control being seized by a new High Church vicar, and he remained on good terms with the Church's patron, the Revd. John Brodie Innes. There was continuing interest in Charles Darwin's views on religion, but he remained reticent.

Despite repeated problems and delays caused by Charles Darwin's illness, his work on evolution-related experiments and investigations continued, with the production of books on the movement of climbing plants, insectivorous plants, the effects of cross and self fertilisation of plants, different forms of flowers on plants of the same species, and ''The Power of Movement in Plants''. His ideas on evolution were increasingly accepted in scientific circles despite some bitter disputes, and he received numerous honours. As well as writing out his own autobiography for his family, he wrote an introduction to a biography of his grandfather Erasmus Darwin. In his last book, he returned to the effect earthworms have on soil formation.

He died in Downe, Kent, England, on 19 April 1882. He had expected to be buried in St Mary's churchyard at Downe, but at the request of Darwin's colleagues, William Spottiswoode (President of the Royal Society) arranged for Darwin to be given a major ceremonial funeral and buried in Westminster Abbey, close to John Herschel and Isaac Newton.

Background

In the aftermath of the publication of '' On the Origin of Species through Natural Selection'' in 1859, Charles Darwin's allies Charles Lyell, Joseph Dalton Hooker, Thomas Huxley, Alfred Russel Wallace and Asa Gray in America worked to spread acceptance of its ideas despite difficulty in coming to terms with natural selection and man's descent from animals.

Darwin's research and experiments on plants and animals continued, and his extensive writings countered the arguments against evolution, particularly those put by the Duke of Argyll and St George Mivart.

Family matters, eugenics

Darwin's sons George and Horace were ill and arrived home at Christmas 1872 for nursing. Darwin turned from his insectivorous plants to a more leisurely update of his monograph on climbing plants.

He was intrigued by Galton's latest "hereditary improvement" ideas (which would be called Eugenics after 1883), proposing that society should breed out mental and physical disability and improve the nation's stock by introducing "a sentiment of caste among those who are naturally gifted". Families would be registered and incentives offered so that the best children chosen from each "superior family" would marry and reproduce. Darwin, aware that of his brood only William had good health, had already dismissed the aims as too "utopian" in '' the Descent of Man''. He thought these new proposals impractical if voluntary and politically horrifying if enforced by compulsory registration, even were they the "sole feasible" way of "improving the human race". He felt it better simply to publicise the "all-important principle of inheritance" and let people pursue the "grand" objective for themselves. In any case it was too late for his own infirm offspring.

Huxley was also ill, needing a rest and harried by a neighbour suing over a damp basement. The X Club (a dining club formed in November 1864 to support the evolutionary "new reformation" in naturalism, including Huxley, Hooker, John Tyndall, Busk, Spencer, and Spottiswoode) raised a £2,000 collection for him, primed by Darwin with £300. Darwin's spirits were again downcast when Lyell's wife died.

In June 1873 Darwin resumed work on his insectivorous plants, with some distractions as his wife Emma took care of the seven Huxley children while Huxley and Hooker went on holiday to the continent. Having young children in the house was like the 1850s again.

Parish conflict

A new reforming High Church vicar, the Revd. George Sketchley Ffinden, had been imposing his ideas since taking over the parish in November 1871. Darwin had to write to the patron, John Brodie Innes, explaining what had upset the parishioners. Ffinden now usurped control of the village school which had been run for years by a committee of Darwin, Lubbock and the incumbent priest, with a "conscience clause" which protected the children from Anglican indoctrination. Ffinden began lessons on the ''Thirty-nine Articles of the Anglican faith'', an unwelcome move from the point of view of the Baptists in the village. Darwin withdrew from the committee and cut his annual donation to the church, but continued with the Friendly Society work.

Hensleigh Wedgwood's daughter Effie had married Thomas "Theta" Farrer in May, and on 5 August 1873 the Darwins went to visit them for a few days. They arrived to hear that a fortnight previously the Farrer's servants had been called to an accident. Earl Granville's riding companion Samuel Wilberforce had been killed in a fall from his horse, and was subsequently laid out in state for two days in the Farrer's drawing room. Although an opponent of the ''Origin'', Wilberforce had always thought Darwin a "capital fellow".

Pause

At home, a heated discussion with Hooker ended with Darwin lying in bed with his memory gone and "a severe shock continually passing through my brain". Emma feared an epileptic fit, but the doctor put him on a diet and in September he returned to work on insectivorous plants. His correspondence continued, funding worthy projects and acknowledging countless gifts including ''Das Kapital'' from "a sincere admirer", Karl Marx, which Darwin had difficulty in following, but hoped that both their efforts towards "the extension of knowledge... ouldadd to the happiness of mankind".

Frank struggled with his medical studies, and after finishing his thesis on animal tissues he was to assist with plant tissues at Downe. George's legal career had been ended by stomach illness and he had spent two years going to spas. He began writing topical essays, the first in the ''Contemporary Review'' on Galton. His latest essay boldly dismissed prayer, divine morals and "future rewards & punishments". Darwin urged him not to publish it for some months, and "to pause, pause, pause."

Fiske

During a visit in November 1873 the Harvard philosopher John Fiske amused the X Club with his story of a cockney in New York warning him "What, that 'orrid hold hinfidel 'Uxley? Why, we don't think hanythink of 'im in Hingland! We think 'e's 'orrid!", himself writing that "I am quite wild over Huxley... what a pleasure to meet such a clean-cut mind! It is like Saladin's sword which cut through the cushion." and "Old Darwin is the dearest, sweetest, loveliest old grandpa that ever was. And on the whole he impresses me with his strength more than any man I have seen yet. There is a charming kind of quiet strength about him and about everything he does. He isn't burning and eager like Huxley. He has a mild blue eye, and is the gentlest of gentle old fellows. islong white hair and enormous white beard ade himvery picturesque... guileless simplicity... I am afraid I shall never see him again, for his health is very bad. Of all my days in England I prize today the most."

New edition of ''The Descent of Man''

Darwin tackled a new edition of the ''Descent of Man'', and offered the self-financing Wallace the work of assisting him. Wallace quoted seven shillings an hour, mentioning that he was "dipping into politics" proposing nationalisation of coal mining. Emma found out and had the task given to their son George, so Darwin had to write apologetically to Wallace, adding "I hope to Heaven that politics will not replace natural science."

Parish reading room

For two years, Emma had organised a winter reading room in the local school for local labourers, who subscribed a penny a week to smoke and play games, with "Respectable newspapers & a few books... & a respectable housekeeper..there every evening to maintain decorum." This was a common facility to save men from "resorting to the public house". In 1873 the Revd. Ffinden opposed it, as "Coffee drinking, bagatelle & other games" had been allowed and "the effects of tobacco smoke & spitting" were seen when the children returned in the morning. Emma got Darwin to get the approval of the education inspectorate in London, and just before Christmas 1873 the Darwins and Lubbocks got the agreement of the school committee, offering to pay for any repairs needed "to afford every possible opportunity to the working class for self improvement & amusement". A furious Ffinden huffed that it was "quite out of order" for the Darwins to have gone to the inspectorate behind his back. In the autumn of 1874 Darwin let off steam at Ffinden and formally resigned from the school committee on health grounds.

Spiritualism

Francis Galton was attracted to the recent spiritualism movement. On a visit to London in January 1874 Darwin attended a séance at Erasmus's house with relatives including Hensleigh Wedgwood, as well as Huxley. George had hired the medium Charles Williams, and they sat round the table in the dark, but as the room grew stuffy Darwin went upstairs to lie down, missing the show, with sparks, sounds and the table rising above their heads. While Galton thought it a "good séance", Darwin later wrote "The Lord have mercy on us all, if we have to believe such rubbish" and told Emma that it was "all imposture" and "it would take an enormous weight of evidence" to convince him otherwise. At a second séance Huxley and George found that Williams was nothing but a cheat, to Darwin's relief. Emma told Hensleigh's daughter Snow that Charles "won't believe it, he dislikes the thought of it so much". Snow remembered that her uncle "used to look upon it as a great weakness if one allowed wish to influence belief" and when Emma said that "he does not always act up to his principles" Snow thought that was "what one means by bigotry", to which Emma said "Oh yes, he is a regular bigot".

New edition of ''Descent''

Darwin continued painfully rewriting his books with the help of Henrietta and George, incorporating ideas from Galton and new anecdotes. He bought from Lubbock the Sandwalk he had been renting for years, but the price seemed excessive and affected their friendship. News of a dispute involving the removal of George Bentham from presidency of the Linnean Society, allegedly spurred on by Owen, led Darwin to write "What a demon on earth Owen is. I do hate him". With Huxley's assistance he updated the ''Descent'' on ape-brain inheritance, which Huxley thought "pounds the enemy into a jelly... though none but anatomists" would know it.

The manuscript was completed in April 1874, and the publisher John Murray planned a 12 shilling half-price edition to replicate the success of the cheap revision of the ''Origin''. Darwin left the proofs to George, and turned again to Plants. The new edition was published on 13 November with the price cut to the bone at 9 shillings.

Insectivorous plants

During 1874 Darwin contacted many of his old friends to assist with experimentation on insectivorous or carnivorous plants. Helpers included Hooker and his assistant William Thiselton-Dyer at Kew, John Burdon-Sanderson at University College London running lab tests on the plant's digestion, and Asa Gray at Harvard. Enquiries to ''Nature'' magazine brought in sacks of mail to be dealt with by Frank, who settled into Brodie Innes's old house in the village and married Amy Ruck on 23 July. At this time the family was joined by George Romanes who had been a student with Frank at Cambridge. Plants experimented on were members of the genera ''Drosera'' and '' Pinguicula'', including '' D. rotundifolia'' and '' P. vulgaris''.

Controversy with Mivart

As well as working on the proofs, George Darwin made a statistical analysis of first cousin marriages (three times more frequent in "our rank" than in the lower) and, influenced by Galton, published an article on "beneficial restrictions in marriage". Mivart attacked this anonymously in the ''Quarterly Review'', misinterpreting advocacy of divorce in cases of criminality or advice as " the most oppressive laws, and the encouragement of vice in order to check population", talking of "hideous sexual criminality". A furious Darwin told George to take legal advice while he contacted the publisher of his books and the ''Quarterly'', John Murray, threatening to "take his business elsewhere".

Darwin's holiday at Southampton with William was overshadowed as he drafted George's response. John Tyndall's address to the British Association later that month laid claim to "wrest from theology the entire domain of cosmological theory" and led to calls for his prosecution for blasphemy. Lyell, now nearly blind and in deteriorating health, wrote to Darwin applauding the boost to "you and your theory of evolution" despite his qualms about the hereafter. Darwin was sympathetic, but did "not feel any innate conviction" of life after death. The October issue of the ''Quarterly'' carried George's response and an "apology" from Mivart which still maintained "that the doctrines... are most dangerous and pernicious" and infuriated Darwin.

On 13 November Hooker's wife Fanny died suddenly, and a devastated Hooker felt unable to return home after the funeral and brought his family to Downe. Emma looked after the children, and when Hooker returned to Kew, Darwin urged "hard work" to overcome his "utter desolation". Later, Darwin mentioned the Mivart argument and Hooker rallied the X Club (a dining club formed in November 1864 to support the evolutionary "new reformation" in naturalism, including Huxley, Hooker, John Tyndall, Busk, Spencer, and Spottiswoode). Huxley eagerly used a review to attack "anonymous slander", telling Darwin that he "ought to be like one of the blessed gods of Elysium, and let the inferior deities do battle with the infernal powers." Mivart confidentially pleaded to make amends, but Huxley told Darwin that the "most effectual punishment" was to "give him the cold shoulder". Darwin was itching to speak his mind, and when no apology had come by 12 January 1875 he wrote vowing never to communicate with Mivart again.

''Insectivorous Plants'', parish and vivisection

Darwin struggled on, by February 1875 telling George that "I know full well the feeling of life being objectless & all being vanity of vanities", and Hooker that he was even "ready to commit suicide". The death of Lyell on 22 February had him feeling "as if we were all soon to go". Their friendship had cooled after Lyell declined to back natural selection, and Darwin pleaded illness rather than take part as a pall-bearer at the funeral in Westminster Abbey. In March Darwin took the proofs of ''Insectivorous Plants'' to Murray.

For a year the vicar had refused to speak to any of the Darwins, and when two evening lectures were proposed for the village, Lubbock had to act as an intermediary in requesting use of the schoolroom. The committee agreed, but Ffinden refused to co-operate, writing that "I had long been aware of the harmful tendencies to revealed religion of Mr. Darwin's views, but.. I had fully determined.. not to let my difference of opinion interfere with a friendly feeling as neighbours, trusting that God's grace might in time bring one so highly gifted intellectually and morally to a better mind." Darwin was equally haughty in return, condescending that "If Mr. F bows to Mrs D. and myself, we will return it". He found that dealing with Mivart and Ffinden was increasing his private hostility to Christianity.

Darwin's daughter Henrietta at first supported a petition drawn up by Frances Power Cobbe demanding anti-vivisection legislation. Though Darwin was an animal lover and had never carried out vivisection, he persuaded her that "Physiology can only progress by experiments on living animals". During his spring break in London he took the matter up with his contacts, at first thinking of a counter-petition, then on Huxley's advice seeking support lobbying for a pre-emptive bill to provide for regulated vivisection with what he called a "more humanitarian aspect". The hint to the fox-hunting houses of parliament that a ban could lead to further restrictions helped, and though Cobbe's bill reached the House of Lords on 4 May 1875 a week before the scientist's bill reached the House of Commons, the Home Secretary announced a Royal Commission of inquiry to resolve the arguments, with Huxley co-opted on to the Commission.

The demand for Darwin as an author was shown when ''Insectivorous Plants'', a 450-page catalogue of plant experiments, sold out quickly and in July a 1,000 copy reprint sold out within a fortnight.

''Variation'' revised

Now Darwin turned to work on a new edition of '' The Variation of Animals and Plants Under Domestication'' incorporating additions from the hundreds of letters and scores of monographs that had been sent to Darwin in the seven years since it had been published. Parts were altered or discarded, and George Romanes set aside work on jellyfish to graft vegetable plants in experiments aimed at finding out about the "gemmules" which Darwin thought formed the mechanism of inheritance of characteristics. Investigations into " pangenesis" by Galton had tried blood transfusions between different breeds of rabbits without success. Darwin continued to look for proof of inheritance of acquired characteristics, amassing evidence of blacksmith's children being muscular and babies born with scars matching those of their parents. He would not follow Huxley in discarding these ideas, and ''Descent'' had presented such inheritance as a significant factor in human evolution.

Darwin had long been concerned that his children could have inherited his weaknesses. He was proud that Frank seemed to have inherited his interest in natural history, coming to Down House from the village to carry out plant experiments, and put his son up for a Fellowship of the Linnean Society.

''Cross and Self Fertilisation''

With ''Variation'' at the printers and with his old essay on ''The Movements and Habits of Climbing Plants'' due out in November 1875 with "illustrations... drawn by my son, George", Darwin wrote ''The Effects of Cross and Self Fertilisation in the Vegetable Kingdom''. This drew on a painstaking series of experiments, protecting the plants from insects and controlling the pollination of flowers, counting the seeds and checking them for fertility, repeated for up to ten generations with detailed records kept at every stage.

Darwin tabulated the results, Galton checked his statistics, and they found the crossed plants significantly superior to self-fertilised ones in height, weight, vigour and fertility. The same principle would apply to people, and though the attempt to get a question on the census had failed, George analysed data from lunatic asylums and the ''Pall Mall Gazette'' which Darwin cited as showing a small effect produced by first-cousin marriages.

While Emma ensured that he took short breaks, Darwin pressed on with work as "my sole pleasure in life" and finished the first draft of ''Fertilisation'' in May 1876, promptly going on to a revision of ''Orchids''.

''Recollections''

They visited Hensleigh and Fanny to celebrate the announcement that Frank's wife Amy was five months pregnant, and Charles and Emma would shortly become grandparents. Darwin decided to leave a posthumous memoir for his family, and on Sunday 28 May 1876 he began ''Recollections of the Development of my mind and character''. He found this candid private memoir easy going, covering his childhood, university, life on the Beagle and developing work in science. A section headed "Religious Belief" opened just before his marriage, and frankly discussed his long disagreement with Emma. (''see Charles Darwin's views on religion'') He recalled Annie and thought of how, but for her untimely death, she would now "have grown into a delightful woman... Tears still come into my eyes, when I think of her sweet ways". He completed his memoir on 3 August, concluding that after his book on fertilisation was published, "my strength... will probably be exhausted".

On 7 September the baby, named Bernard, was born at Down House, but his mother suffered a fever and convulsions, and died four days later at the age of 26. Darwin thought it the "most dreadful thing", and Frank in a state of shock and grief moved into Down House with the baby. The contractors were brought in to extend the house for him, and Frank carried on with mechanical chores for his father, making a fair copy of the memoir and correcting proofs of ''Orchids''.

Liberalism

Despite Ffinden's continuing opposition, Emma's project of a parish reading room for labourers was restarted and opened before Christmas. Darwin saw ''Orchids'' and ''Cross and Self Fertilisation'' published as he wrote his next book on flowers. In February 1877 he attended the ''George and Dragon'' in his position as treasurer and persuaded the village labourers, who were suffering from wage cuts and a threat to their jobs in a farm slump, not to disband the ''Friendly Society'' and take the proceeds, but to keep some protection for their longer term security by keeping the books open while distributing their surplus funds. His old Whig principles fitted well with the ''Self-Help'' philosophy of another Murray author, Samuel Smiles, who had impressed Darwin.

As a "thorough Liberal", Darwin supported Gladstone, the "Grand Old Man" of British politics. Three months earlier Darwin had backed the outcry against the "Bulgarian horrors" when 15,000 (Christian) Bulgarian rebels were massacred by Muslim "Turkish" troops of the Ottoman Empire, and supported Gladstone's calls for Russian intervention in opposition to the Tory government's support for the Turks. Marx thought this a hypocritical preference for a Christian oppressor, and complained about Darwin's support for the "piggish demonstration". On 10 March Gladstone, while doing the rounds of his backbenchers and visiting Lubbock, turned up with his entourage at Down House and for two hours regaled a silent Darwin with comments from his latest pamphlet on "Turkish terrorism", and "launched forth his thunderbolts with unexhausted zest". Before leaving he asked Darwin if evolution meant that the future belonged to America as the Eastern civilisations decayed; after thinking it over, Darwin responded "Yes." Watching Gladstone's "erect alert figure" walking away, he said "What an honour that such a great man should come to visit me!"

A fortnight after Gladstone's visit, the leading secularist, militant atheist and unofficial Liberal candidate Charles Bradlaugh with co-publisher Annie Besant caused public outrage by publishing do-it-yourself contraceptive advice from an American doctor, Charles Knowlton, in a sixpenny pamphlet ''Fruits of Philosophy''. Bradlaugh and Besant were accused of obscenity and committed for trial on 18 June 1877. A fortnight beforehand they subpoenaed Darwin for their defence, expecting his support. Appalled, he wrote protesting the "great suffering" this would put him to, and advised that he would have to denounce the defendants as he had "long held an opposite opinion" on birth control, as evidenced by an extract from the ''Descent of Man'' stating that "our natural rate of increase, though leading to many and obvious evils, must not be greatly diminished by any means." The practice of contraception would "spread to unmarried women & would destroy chastity on which the family bond depends; & the weakening of this bond would be the greatest of all evils to mankind."

Holidays

The subpoena was dropped, and Darwin was not held back from holidaying at Leith Hill and Southampton for his much needed "rest" which, as usual, meant working furiously away from home. He visited Stonehenge for the first time, examining how worm castings had buried the megaliths over time. Emma feared that the day-trip involving two hours train journey and a 24-mile drive would "half kill" him, but he was in wonderful form even after digging in the hot sun.

In mid July 1877 his work on the sex life of plants culminated in the publication of ''The Different Forms of Flowers on Plants of the Same Species'', dedicated to Asa Gray. He could not "endure being idle" and turned to his next book, on plant movement. Emma got him away for his autumn break to Abinger on the North Downs, and though Wallace now lived only a few miles away, Darwin avoided him, diplomatically writing that he "wished to come over to see you, but driving tires me so much that my courage failed."

Honorary doctorate

The University of Cambridge had come round to Darwinism, and on Saturday 17 November the family attended the Senate House for a ceremony in which Darwin was awarded an honorary Doctorate of Laws (L.L.D.) in front of crowds of students, who strung a cord across the chamber with a monkey-marionette which was removed by a Proctor then replaced by a "missing link", a beribboned ring which hung over the crowd through the ceremony.

Darwin entered to a roar of approval. The Public Orator gave his panegyric describing Darwin's work with purple Latin prose, to some good humoured heckling from the students, and distanced the dignitaries from "the unlovely tribe of apes" saying "'Mores in utroques dispares' – the moral nature of the two races is different".

Emma had a headache, so she and Darwin let their boys to stand in for them at a dinner in his honour at which Huxley chided the university for failing to honour Darwin twenty years earlier. On the Sunday, after a "brilliant luncheon" with George at Trinity College, they were given guided tours. The engineering professor James Stuart showed Emma and Darwin round his workshop and later wrote of "A strong.. looking man with iron grey hair..s thoughrough hewn from a rock with a heavy..hammer,... A man of genius.. indeed one of 'the few'."

Darwin wrote to Hooker's wife thanking her for bananas sent from Kew, "such splendid ones that even a L.L.D. may be excused for enjoying them. There was a tremendous crowd & hooting & cheering at the Senate House yesterday, with a suspended monkey &c".

Romanes

Into the spring of 1878 Darwin and Frank again filled the house with experiments on the movement of plants. To Frank it was "as if an outside force were compelling him", and in March the strain brought back his old sickness of attacks of dizziness. Dr. Clark in London prescribed a "dry diet" which helped, and refused to charge his patient so Darwin sent £100 towards the development of a fungus-proof potato by a "highly respectable" Belfast breeder. He also responded to an appeal asking 's officers for help in supporting an orphan – the grandson of Jemmy Button.

George Romanes had become Darwin's leading protégé, but a conflict between his reasoned scepticism and earlier longing for faith came to a head when his sister died. His attempt to get solace from a leading spiritualist came to nothing. Darwin invited Romanes to Downe to help him recover. Romanes had earlier written a refutation of theism, and had taken Darwin's advice to pause, but now wanted to publish. Darwin counselled anonymity, and suggested study of the evolution of religious reasoning, giving him unused notes on instinct from his work on ''Natural Selection''. Romanes launched on the study of comparative psychology, and in August was given a standing ovation for his talk at the British Association. In November the Darwins were staying with the Litchfields, and Romanes drove there to introduce his fiancé and present his new book, ''A Candid Examination of Theism'' by "Physicus". Darwin read it with "very great interest", but was unconvinced.

Biography of Erasmus Darwin

The German scientific periodical ''Kosmos'' featured, as a 70th birthday tribute to Charles Darwin, an essay by Ernst Krause on his grandfather Erasmus Darwin. In March 1879 he arranged for it to be translated as a book to which he would add a biographical preface. This would counter Samuel Butler's ''Evolution Old and New'' in which the previously supportive, though unscientific, author of ''Erewhon'' had turned against Darwinism, and he sent a copy of it to Krause.
In the summer he became bogged down with the proofs of his preface about Erasmus, and Henrietta edited out controversial points. The publisher John Murray was satisfied, but Darwin vowed "never again" to be "tempted out of my proper work".

Abominable mystery

The origin and swift diversification of flowering plants in the Early Cretaceous appeared to go against Darwin's view of gradual evolution, and in a July 1879 letter to Joseph Dalton Hooker he called this an "abominable mystery". He sought explanations such as a long earlier development having taken place in an area where the fossil record had been lost, possibly a sunken continent, or relatively rapid development having been spurred by coevolution between insects and plants.

Although he tired more quickly now, Darwin still worked for several hours a day. Emma ensured he took holidays, in autumn 1879 joining the Litchfields for a month in the Lake District where he met with John Ruskin, though this was not a meeting of minds. On return the Darwins were visited by Ernst Haeckel whose "roaring" about the freedom of science had Darwin retreating to his plants.

Darwin unsuccessfully tried to get government support for the Belfast potato breeder from the Permanent Secretary, Thomas "Theta" Farrer (Effie Wedgwood's husband). Farrer was more concerned that his daughter by his first marriage wanted to marry the unsuitable sickly Horace Darwin. Despite her father's opposition the young couple prevailed, with Darwin giving his son £5,000 of railway stock and assuring Farrer that Horace would have a suitable inheritance. The wedding took place on 3 January 1880, with the families not on speaking terms.

Samuel Butler

In ''Evolution Old and New'' Samuel Butler claimed that earlier evolutionists had correctly seen the mind as controlling evolution, and Mivart told Richard Owen that he thought the book would "help to burst the bubble of 'Natural Selection'." Ernst Krause's ''Erasmus Darwin'' countered this, and Butler took affront at Darwin's preface which said that Krause's essay predated Butler's book, when it clearly had passages written later. Darwin had to admit that Krause had revised his essay, and spent a week in February 1880 drafting responses, then was persuaded to ignore the dispute, writing to Huxley "I feel like a man condemned to be hung who has just got a reprieve". Butler took the silence as a tacit admission of guilt.

Coming of Age

Huxley titled his Royal Institution talk ''The Coming of Age of the Origin of Species'', celebrating its 21st anniversary, though wrongly claiming that before its publication only catastrophism was accepted. While Darwin (on holiday with the Farrers, now on good terms) was delighted by the press coverage, he was disappointed to find no mention in its text of natural selection – even "Darwin's Bulldog" was still not committed to the central plank of his theory.

In April, Gladstone defeated the Tories at the general election, delighting Charles and Emma Darwin though not all their relatives, and a buoyant Charles sent a large subscription to Abbot's ''The Index'' with hearty wishes for success in the "good cause of truth" and 'free religion'. The Liberal success even got the militant atheist Charles Bradlaugh elected as MP for Northampton, and public controversy about atheism erupted. He was prevented from taking his seat in the House of Commons by procedural requirements of the oath of allegiance, and secularists such as Edward Aveling toured the country leading protests. Aveling had been writing a series on ''Darwin and his Works'' in Bradlaugh's paper ''The National Reformer'', and Darwin had sent written thanks which he now feared would be published to his shame.

In June, after sending ''Movement in Plants'' to his publisher John Murray, Darwin visited William and Sarah at Southampton, and he got William to write to Abbot withdrawing the endorsement that had been printed as advertising copy in the magazine: even association with free thought in distant America could damage his respectability.

Worms

Darwin again took up his work on worms. As ever, he corresponded widely, encouraging and helping fund research and collecting anecdotes. Emma supported his commitment, saying that "if it was a condition of his living, that he sh ul do now work, she was willing for him to die". For their autumn break they visited Horace and Ida in Cambridge, and to spare him the stress of getting between London stations and changing trains Emma arranged a private railway carriage. At Cambridge he showed Emma around the "scenes of my early life".

In September 1880 he completed the proofs of ''Movement in Plants'', his largest botany book at 600 pages with 196 wood-cuts, sighing "I am turned into a sort of machine for observing facts & grinding out conclusions." When on 13 October he got the request he had feared from Aveling, for permission to dedicate the ''Darwin and his Works'' articles to Darwin in book format, he declined in a four-page letter marked PRIVATE emphasising that he confined his writing to science and avoided aiding attacks on religion.

Attacks on Darwin's theory continued, and when the official report of a scientific voyage slighted "the theory which refers the evolution of species to extreme variation guided only by natural selection" he responded in ''Nature'', "Can Sir Wyville Thomson name any one who has said that the evolution of species depends only on natural selection?" and set out multiple causes, including "use and disuse of parts". He called Thomson's criticism appropriate to "theologians and metaphysicians", and was only stopped by Huxley from using "irreverent language".

Help for Wallace

Wallace was suffering "ever-increasing anxiety" over funds, and Arabella Buckley, Lyell's old secretary, pleaded with Darwin to help him find "some modest work". Hooker persuaded Darwin it was hopeless, noting that Wallace had "lost caste" over spiritualism and a £500 bet he had won by proving the world was a globe to a rich flat-earth fanatic who then started litigation which cost Wallace more than the bet had won. When Wallace's "best book" to date, ''Island Life'', came out in November 1880 Darwin devoted all his attention to getting his friends to sign a testimonial he wrote, then rushed it to Gladstone before the re-opening of Parliament at the start of January and was overjoyed when Gladstone agreed to recommend a civil list pension of £200 a year, backdated six months. As Darwin passed on the good news to Wallace, Emma organised the family accounts so that Charles could distribute the surplus from the year's £8,000 investment income to the children.

Work on worms

Downe was snowed in, and an outbreak of swine fever involved Darwin as magistrate signing orders daily to allow movement of stock. He wrote to Kovalevsky "I make sure, but wo ully slow progress, with my new book" on worms. In late February he visited London, and called on Duke of Argyll, his old opponent. They had a long and "awfully friendly" discussion, and when Argyll asked if it was not "impossible to look at he design of orchidswithout seeing that they were the effect and the expression of Mind?", Darwin looked at him "very hard" before replying that he could see the "overwhelming force" this argument might have, but he could no longer accept it.

The billiard room at Down House was now devoted to worm experiments which included Darwin shining different colours of lights at them at night, his sons playing different musical instruments to them, different scents and kinds of food. Other stimuli were ignored, but a bright white light or a touch of breath would make them bolt "like rabbits" into their burrows. They appeared to "enjoy the pleasure of eating" showing "eagerness for certain kinds of food", sexual passion was "strong enough to overcome... their dread of light", and he saw "a trace of social feeling" in their way of "crawling over each other's bodies". Experiments showed that they dragged leaves into their burrows narrow end first, having somehow got a "notion, however rude, of the shape of an object", maybe by "touching it in many places" with a sense like "a man... born blind and deaf" and a rudimentary intelligence.

By mid march he was writing the final chapters of what he told Victor Carus would be "a small book of little moment. I have little strength & feel very old." He wrote to ''The Times'' about the anti-vivisection cause, accusing it of committing "a crime against humanity" by holding back the "progress of physiology", then commented that we "ought to be grateful" to worms, which reached a depth of "five or six feet" even "here at Down" where he expected to be buried shortly.

No heart or strength

Before Easter he sent off his manuscript for ''The Formation of Vegetable Mould through the Action of Worms {{R from other capitalisation ...