as indicated by a poem he apparently composed in 1667. It is thought that also in this year or shortly after he obtained a copy of the important early Irish law tract, Senchas Már. It seems he also travelled to Larne in County Antrim, seeking patronage from Randall MacDonnell, Marquess of Antrim. Here it seems he left or sold about twelve or more manuscripts to a local bard, Eoin Ó Gnímh. Nothing more is known of Mac Fhirbhisigh until January 1671, when his friend Ruaidhrí Ó Flaithbheartaigh noted in a manuscript: "1670/1 mense Janu: Dualdus Firbisius obiit, a Thoma Croftono occisus." Mac Fhirbhisigh was stabbed to death by local man Thomas Crofton, at a shebeen near the village of Skreen, County Sligo. He appears to have been buried at his local church, Kilglass (Cill Molaise). The circumstances of the killing were related by Eugene O'Curry as follows: Fate of his manuscripts According to Ruaidhrí Ó Flaithbheartaigh – as noted by Edward Lhuyd – Dubhaltach's manuscripts were passed on his death to his lord, David O Dowd. Ó Flaithbheartaigh himself obtained Dubhaltach's transcript of Chronicum Scotorum. William O Sullivan believed that his law manuscripts were passed on to John Conry via the library of Tadhg O'Roddy. In 1702, Dubhaltach's genealogical works were in the possession of merchant and part-time scribe, Henry MacCarrick, of Sligo. Leabhar na nGenealach was in this possession till 1705, while the Cuimre disappears after 1706, fate unknown (there exists a possibility that it was in the possession of Richard Tipper of Dublin, scribe, in the years 1710–1730, as he made a copy of it).Leabhar na nGenealach next came into the hands of Séamus Bacach Mág Uidhir of An Leargaidh (Dowra-Blacklion area) who made a copy in 1715 or 1716 at Stranamart, north-west County Cavan. It is of poor value overall. A transcript of Réim Ríoghraidhe Éireann was made by him at Doobally in 1713. It next appeared in Dublin, held by John Conry, who penned extracts from it on 24 July 1723. He may have obtained it from the library of Tadhg O Rodaighe (Thady Roddy) of Crossfield, County Leitrim. It was sold in 1731 to Dr John Fergus (Eoin O Fearghusa) of Jervis Street, Dublin. Fergus also acquired the anonymous copy of the Cuimre. Following his death and that of his son, Dr. Fergus's daughter put his extensive library up for auction at their home in