John Fergus was an Irish physician and man of letters, c.1700 – c.1761. Biography A descendant of the Ó Fearghuis medical family of Connacht, Doctor Fergus a native of County Mayo but moved to Dublin city early in his adult life. He was a scribe, and book collector, as well as a member of the Ó Neachtáin literary circle in early 18th century Dublin. He amassed a huge library of Irish manuscripts, which included the Liber Flavus Fergusiorum, a medical text created by his ancestors in the 14th century. Sources John Fergus MD: Eighteenth-century Doctor, Book Collector and Irish Scholar, by Diarmaid O Cathain, in Journal of the Royal Society of Antiquaries of Ireland, pp. 139–163, volume 118, 1988. See also Seon Mac Solaidh Tadhg Ó Neachtain Richard Tipper Charles O'Conor (historian) External links https://web.archive.org/web/20120508201733/http://www.ria.ie/Library/Special-Collections/Manuscripts/Liber-Flavus-Fergusiorum.aspx 18th-century Irish writers 18th-century Irish male writers 18th-century Irish medical doctors Irish scholars and academics People from County Mayo Medical doctors from Dublin (city) Irish scribes Irish book and manuscript collectors 1700s births 1760s deaths Irish-language writers