Guillaume Le Testu, sometimes referred to as Guillaume Le Têtu (c. 1509-12 – April 29, 1573), was a French
privateer
A privateer is a private person or vessel which engages in commerce raiding under a commission of war. Since robbery under arms was a common aspect of seaborne trade, until the early 19th century all merchant ships carried arms. A sovereign o ...
, explorer and navigator. He was one of the foremost
cartographer
Cartography (; from , 'papyrus, sheet of paper, map'; and , 'write') is the study and practice of making and using maps. Combining science, aesthetics and technique, cartography builds on the premise that reality (or an imagined reality) can ...
s of his time and an author of the
Dieppe maps
The Dieppe maps are a series of world maps and atlases produced in Dieppe, Seine-Maritime, Dieppe, France, in the 1540s, 1550s, and 1560s. They are large hand-produced works, commissioned for wealthy and royal patrons, including Kings Henry II of ...
. His maps were distinguished by their sophistication and detail; they influenced generations of cartographers, navigators and explorers.
Le Testu was successful as a privateer during the early years of the
French Wars of Religion
The French Wars of Religion were a series of civil wars between French Catholic Church, Catholics and Protestantism, Protestants (called Huguenots) from 1562 to 1598. Between two and four million people died from violence, famine or disease di ...
. In 1573, he and Sir
Francis Drake
Sir Francis Drake ( 1540 – 28 January 1596) was an English Exploration, explorer and privateer best known for making the Francis Drake's circumnavigation, second circumnavigation of the world in a single expedition between 1577 and 1580 (bein ...
attacked a Spanish mule train escorting gold and silver to
Nombre de Dios on the Atlantic coast of Panama, and he was subsequently killed following his capture by the Spanish.
Suggestions that Le Testu may have mapped (or even visited)
Australia
Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...
are based on: first, his maps' depiction of a large island (or continent), south of
Java
Java is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea (a part of Pacific Ocean) to the north. With a population of 156.9 million people (including Madura) in mid 2024, proje ...
, which Le Testu identified as the ''
Jave la Grande'' ("Java Major" or "Great Java") mentioned by
Marco Polo
Marco Polo (; ; ; 8 January 1324) was a Republic of Venice, Venetian merchant, explorer and writer who travelled through Asia along the Silk Road between 1271 and 1295. His travels are recorded in ''The Travels of Marco Polo'' (also known a ...
(and was otherwise known at the time as ''
Terra Australis
(Latin for ) was a hypothetical continent first posited in antiquity and which appeared on maps between the 15th and 18th centuries. Its existence was not based on any survey or direct observation, but rather on the idea that continental l ...
'') and second, Le Testu's incorporation in these maps of birds that resemble
black swan
The black swan (''Cygnus atratus'') is a large Anatidae, waterbird, a species of swan which breeds mainly in the southeast and southwest regions of Australia. Within Australia, the black swan is nomadic, with erratic migration patterns dependent ...
s and
cassowaries
Cassowaries (; Biak language, Biak: ''man suar'' ; ; Papuan_languages, Papuan: ''kasu weri'' ) are flightless birds of the genus ''Casuarius'', in the order Casuariiformes. They are classified as ratites, flightless birds without a keel (bird a ...
, which are both native to Australia. However, he did not claim to have seen Jave la Grande in person and many cartographers at the time incorporated hypothetical, mythological or fantastic elements, a practice that is clearly also true of Le Testu. His maps also showed
unicorn
The unicorn is a legendary creature that has been described since Classical antiquity, antiquity as a beast with a single large, pointed, spiraling horn (anatomy), horn projecting from its forehead.
In European literature and art, the unico ...
s and
monstrous creatures such as 200 metre long
giant snakes,
basilisk
In European bestiary, bestiaries and legends, a basilisk ( or ) is a legendary reptile reputed to be a Serpent symbolism, serpent king, who causes death to those who look into its eyes. According to the ''Natural History (Pliny), Naturalis Histo ...
s,
satyrs
In Greek mythology, a satyr (, ), also known as a silenus or ''silenos'' ( ), and sileni (plural), is a male nature spirit with ears and a tail resembling those of a horse, as well as a permanent, exaggerated erection. Early artistic represen ...
,
Blemmyes
The Blemmyes ( or Βλέμυες, ''Blémues'' , Latin: ''Blemmyae'') were an Eastern Desert people who appeared in written sources from the 7th century BC until the 8th century AD. By the late 4th century, they had occupied Lower Nubia and esta ...
(headless humans) and
Cynocephalics (dog-headed humans).
Le Testu's work was used by Admiral
Gaspard de Coligny and
French Huguenots hoping to establish themselves in
Brazil
Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...
,
Florida
Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic ...
, the Caribbean and even the ''Terra Australis'' derived from Le Testu's "Jave la Grande". However, these attempts were abandoned following Coligny's assassination in 1572 and Le Testu's death the following year.
[Quinn, David B. ''Explorers and Colonies: America, 1500-1625''. London: Hambleton Press, 1990. (pg. 63) ]
Biography

Guillaume le Testu was born sometime around 1509–12, in either
Le Havre, Normandy or
Grasse, Provence.
He was one of the last students to be taught
cartography
Cartography (; from , 'papyrus, sheet of paper, map'; and , 'write') is the study and practice of making and using maps. Combining science, aesthetics and technique, cartography builds on the premise that reality (or an imagined reality) can ...
at the famed school of
Dieppe
Dieppe (; ; or Old Norse ) is a coastal commune in the Seine-Maritime department, Normandy, northern France.
Dieppe is a seaport on the English Channel at the mouth of the river Arques. A regular ferry service runs to Newhaven in England ...
. Le Testu subsequently took part in voyages of exploration throughout the
Atlantic Ocean
The Atlantic Ocean is the second largest of the world's five borders of the oceans, oceanic divisions, with an area of about . It covers approximately 17% of Earth#Surface, Earth's surface and about 24% of its water surface area. During the ...
.
In 1550, Le Testu was commissioned by King
Henry II
Henry II may refer to:
Kings
* Saint Henry II, Holy Roman Emperor (972–1024), crowned King of Germany in 1002, of Italy in 1004 and Emperor in 1014
*Henry II of England (1133–89), reigned from 1154
*Henry II of Jerusalem and Cyprus (1271–1 ...
to create a map of the Americas, particularly where the French were trading. In June 1551, he sailed to
Brazil
Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...
on both an exploration and reconnaissance mission from Henry II, charting as far as the
Rio de la Plata
Rio or Río is the Portuguese and Spanish word for "river". The word also exists in Italian, but is largely obsolete and used in a poetical or literary context to mean "stream".
Rio, RIO or Río may also refer to:
Places United States
* Rio, Fl ...
. His ship, the ''Salamandre'', reached as far south as 26 latitude a fair distance past present-day
Rio de Janeiro
Rio de Janeiro, or simply Rio, is the capital of the Rio de Janeiro (state), state of Rio de Janeiro. It is the List of cities in Brazil by population, second-most-populous city in Brazil (after São Paulo) and the Largest cities in the America ...
. In late December, he became involved in a firefight with two Portuguese ships near
Trinidad
Trinidad is the larger, more populous island of the Republic of Trinidad and Tobago, the country. The island lies off the northeastern coast of Venezuela and sits on the continental shelf of South America. It is the southernmost island in ...
and sustained heavy damage to his ship, although he was successful in mapping much of the South American coastline by the time of his return to Dieppe in July 1552.
Le Testu was also involved in the founding of a French colony near
Rio de Janeiro
Rio de Janeiro, or simply Rio, is the capital of the Rio de Janeiro (state), state of Rio de Janeiro. It is the List of cities in Brazil by population, second-most-populous city in Brazil (after São Paulo) and the Largest cities in the America ...
in 1555.
In 1555 or 1556, Le Testu composed a world atlas entitled ''Cosmographie Universelle selon les Navigateurs, tant anciens que modernes'' and was consequently awarded the title of ''Pilote Royale'' by Henry II. The ''Cosmographie Universelle'' contained 56 maps reportedly based on charts Le Testu had personally drawn by hand on his expeditions. This atlas extolled the military triumphs and imperialist dreams of the French monarchy, and was dedicated to Le Testu's mentor and patron Admiral
Gaspard de Coligny, who had become leader of the
Huguenots
The Huguenots ( , ; ) are a Religious denomination, religious group of French people, French Protestants who held to the Reformed (Calvinist) tradition of Protestantism. The term, which may be derived from the name of a Swiss political leader, ...
three years earlier. The manuscript was based on charts from French, Spanish and Portuguese sources supplied by Coligny. Included in this atlas were twelve charts of ''Jave le Grand/Terra Australis,'' which Le Testu located southward of the
Moluccas
The Maluku Islands ( ; , ) or the Moluccas ( ; ) are an archipelago in the eastern part of Indonesia. Tectonically they are located on the Halmahera Plate within the Molucca Sea Collision Zone. Geographically they are located in West Melanesi ...
. Le Testu commented: "However, what I have marked and depicted is only by imagination, and I have not noted or remarked on any of the commodities or incommodities of the place, nor its mountains, rivers or other things; for there has never yet been any man who has made a certain discovery of it." Coligny subsequently supported a proposal from the
d'Albagno brothers, for an expedition to Terra Australis to investigate the possibility of a French colony there.
Three centuries later, the English scholar
Edward Jenks suggested that a chart said to have been created in 1542 and later held by the
British Museum
The British Museum is a Museum, public museum dedicated to human history, art and culture located in the Bloomsbury area of London. Its permanent collection of eight million works is the largest in the world. It documents the story of human cu ...
may have been Le Testu's source for Jave la Grande. Le Testu's ''Cosmographie Universelle'' (1555) and world atlas (1556) are both in the
Bibliothèque Nationale
A library is a collection of books, and possibly other materials and media, that is accessible for use by its members and members of allied institutions. Libraries provide physical (hard copies) or digital (soft copies) materials, and may be a p ...
in Paris. The map, said Jenks, was said to have been “the property of a man named Rotz, a French sailor who passed some part of his life in England”. Jenks commented: “this fact gives some colour to the claim put forward by the French, that their countryman, Guillaume le Testu, was the true discoverer of Australia. The claim is based mainly upon the fact that Testu’s name appears on a map dated 1555, on which a southern continent, styled
Jave la Grande (“Great Java”), is outlined. But this fact, of course, merely proves that Testu had heard of such a country..."
]
The next several years saw the outbreak of the
French Wars of Religion
The French Wars of Religion were a series of civil wars between French Catholic Church, Catholics and Protestantism, Protestants (called Huguenots) from 1562 to 1598. Between two and four million people died from violence, famine or disease di ...
, civil wars between the Huguenots and Catholics; in 1567, Le Testu sided with the Protestant Huguenots, conducting privateering raids for two years before his capture by the Catholics. He would remain imprisoned for over four years until he was released by order of King
Charles IX of France, Charles IX, due to public interest on his behalf.
Raid on Nombre de Dios and death
On March 23, 1573, Le Testu unexpectedly encountered Sir
Francis Drake
Sir Francis Drake ( 1540 – 28 January 1596) was an English Exploration, explorer and privateer best known for making the Francis Drake's circumnavigation, second circumnavigation of the world in a single expedition between 1577 and 1580 (bein ...
near "Cabo de Cativas", near
Cativá
Cativá is a corregimiento in Colón District, Colón Province, Panama
Panama, officially the Republic of Panama, is a country in Latin America at the southern end of Central America, bordering South America. It is bordered by Costa Rica t ...
,
Panama
Panama, officially the Republic of Panama, is a country in Latin America at the southern end of Central America, bordering South America. It is bordered by Costa Rica to the west, Colombia to the southeast, the Caribbean Sea to the north, and ...
. Le Testu was in command of the 80-ton warship ''Havre'' (or the ''New Haven'') with a crew of seventy; although it is unknown what Le Testu's mission was, he may have been there at the behest of an Italian sponsor. He reportedly presented to Drake a
scimitar
A scimitar ( or ) is a single-edged sword with a convex curved blade of about 75 to 90 cm (30 to 36 inches) associated with Middle Eastern, South Asian, or North African cultures. A European term, ''scimitar'' does not refer to one specific swor ...
, formerly belonging to the ''
condottiero
Condottieri (; singular: ''condottiero'' or ''condottiere'') were Italian military leaders active during the Middle Ages and the early modern period. The term originally referred specifically to commanders of mercenary companies, derived from the ...
''
Piero Strozzi, as a gift on behalf of Coligny. It was during this meeting, having brought news of the
St. Bartholomew's Day massacre, that he offered to join Drake in a final raid against a Spanish mule train en route to
Nombre de Dios before leaving the area.
He and Drake sailed their combined fleet to the "Francisco River" (probably Rio Cuango, near
Cuango, Panama). Le Testu and Drake landed with their men just east of Nombre de Dios. Le Testu had 70 men under his command while Drake himself led 31 men including his
Cimarron allies. As their ships sailed off, with orders to return for them in four days, the party headed inland to a spot two leagues south of the city, arriving on April 29, where they awaited the Spanish mule train. It was soon after their arrival that the party heard bells in the distance signaling the arrival of the caravan. Cimarrons scouts also warned of their approach reporting the size of the caravan consisting of almost 200 mules each carrying up to three hundred pounds of treasure. Drake had chosen the spot for the ambush, believing the Spaniards to be at their most vulnerable as they were nearing their destination after traveling through miles of jungle, to take the mule train off guard in a surprise attack. They drove off the Spanish guards, although at a cost of several Cimarron and Frenchmen.
The attack was a complete success and nearly 30 tons of gold and silver were captured by Drake and Le Testu. Between 80,000 and 100,000 ''
peso
The peso is the monetary unit of several Hispanophone, Spanish-speaking countries in Latin America, as well as the Philippines. Originating in the Spanish Empire, the word translates to "weight". In most countries of the Americas, the symbol com ...
s'' in gold were taken by the privateers: in fact, there was so much treasure that the privateers were unable carry all the silver off and buried what remained. Le Testu's share came to £20,000. However, he was seriously wounded during the first assault and chose to rest with two of his men by the roadside until he was able to travel. As the rest of the party continued to meet the scheduled rendezvous with their fleet, they discovered a Spanish fleet waiting for them instead. Drake was forced to construct a raft and sail out to an island roughly three leagues offshore, where he contacted his own ships. Safely aboard with his crew once more, he sent a rescue party back for La Testu. When Drake's men returned, they reported that Le Testu and his men had been caught by Spanish soldiers and executed. Le Testu was beheaded. One of his men had also been tortured until he revealed the location of most of the buried silver. Le Testu's head was taken back to Nombre de Dios where it was displayed in the marketplace.
Drake's men had managed to find some silver which had been missed, which they brought back to split between the English and French crews before sailing back for Europe. The surviving French later complained the English had taken the majority of the proceeds, however.
It is possible that Le Testu mentioned plans for an expedition to Jave la Grand/Terra Australis to Drake and his associates, and/or otherwise inspired Drake's voyage to the
Pacific Ocean
The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...
and circumnavigation of the world during 1576–1578.
[R. Pearse Chope, 'New Light on Sir Richard Grenville: I. The Projected South Sea Voyage', ''Devonshire Association for the Advancement of Science: Report and Transactions'', vol.49, 1917, pp.210-246.]
References
External links
Online version of the ''Cosmographie universelle'' in the ''Bibliothèque nationale de France''
Further reading
* Guillaume Le Testu, ''Cosmographie universelle selon les navigateurs tant anciens que modernes,'' présentation de Frank Lestringant, Paris, Arthaud (Beaux livres), 2012.
* Anthiaume, Albert. ''Un pilote et cartographe havrais au XVIth siècle''. Paris: Imprimerie nationale, 1911.
* Albert-Marie-Ferdinand Anthiaume, "Un pilote et cartographe havrais au XVIe siècle: Guillaume Le Testu", ''Bulletin de Géographie Historique et Descriptive'', Paris, Nos 1–2, 1911.
* Lemonnier, Léon. ''Sir Francis Drake''. Paris: Le Renaissance du livre, 1932.
Mappemonde en deux hémisphères: Ceste Carte Fut pourtraicte en toute perfection Tant de Latitude que Longitude Par moy Guillaume Le Testu Pillotte Royal Natif de La ville Françoise de grace... et fut achevé le 23e jour de May 1566. Sur cette mappemonde, point de rose des vents qui marquent le nord, le sud, l'est et l'ouest, mais des visages qui soufflent et indiquent les directions.
External links
*
{{DEFAULTSORT:Le Testu, Guillaume
16th-century births
1573 deaths
16th-century explorers
French privateers
French explorers
People from Le Havre
Huguenots
16th-century French cartographers