An Giolla Glas Ó Caiside ( fl. 1515–27) was a Gaelic-

Irish Irish may refer to: Common meanings * Someone or something of, from, or related to: ** Ireland, an island situated off the north-western coast of continental Europe ***Éire, Irish language name for the isle ** Northern Ireland, a constituent unit ...

physician A physician (American English), medical practitioner (Commonwealth English), medical doctor, or simply doctor, is a health professional who practices medicine, which is concerned with promoting, maintaining or restoring health through th ...

and scribe. Ó Caiside was a member of a

brehon Brehon ( ga, breitheamh, ) is a term for a historical arbitration, mediative and judicial role in Gaelic culture. Brehons were part of the system of Early Irish law, which was also simply called " Brehon law". Brehons were judges, close in impo ...

family based in

County Fermanagh County Fermanagh ( ; ) is one of the thirty-two counties of Ireland, one of the nine counties of Ulster and one of the six counties of Northern Ireland. The county covers an area of 1,691 km2 (653 sq mi) and has a population of 61,805 ...

, In the second and third decades of the 16th century, he compiled a manuscript containing "scientific commentary on a wide range of topics including medicine, philosophy, astronomy and botany." Such manuscripts would have created for the use of the family and their colleges, often copied by physicians in other parts of Ireland. A number, such as

Liber Flavus Fergusiorum The ''Liber Flavus Fergusiorum'' ("Yellow Book of the Ó Fearghuis"; RIA MS 23 O 48 a-b) is a medieval Irish text (dated to c. 1437-40) authored by the Ó Fearghuis, an Irish medical family of Connacht who were hereditary physicians to the Iris ...

, became family heirlooms over the centuries. Ó Caiside's manuscript still exists and is stored in the library of

Corpus Christi College, Oxford Corpus Christi College (formally, Corpus Christi College in the University of Oxford; informally abbreviated as Corpus or CCC) is one of the constituent colleges of the University of Oxford in the United Kingdom. Founded in 1517, it is the 12t ...

External links

* https://web.archive.org/web/20150403151732/http://www.cassidyclan.org/cassidys.htm {{DEFAULTSORT:O Caiside, Finghin Medical doctors from County Fermanagh 16th-century Irish writers 16th-century Irish male writers Irish scribes 16th-century Irish medical doctors