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 Rodaighe (Thady Roddy) of Crossfield,
County Leitrim. 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. 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 Abbey Street, Dublin, on 3 February 1766.
Leabhar na nGenealach was purchased by Robert Jocelyn (who became 1st
Earl of Roden in 1771) for £7.1.0. For much of the next hundred and fifty years, it was placed at the Jocelyn family home of
Tollymore House,
Newcastle, County Down, who were in part descended through a female line from the local
Magennis clan. During this time, extensive use of
Leabhar na nGenealach was made by
Charles O'Conor (1770s),
Thady Connellan (1830s),
John O'Donovan (MacCarrick's version) and
Eugene O'Curry, who transcribed between March 1836 and February 1837. Upon the death of
William Henry Jocelyn, 6th Earl of Roden in 1911, it was included in a list of items sold to cover his death duties. The auction was held at
Sotheby's of London on 10 November 1911, and the manuscript was purchased by Dublin physician Dr Michael F. Cox for £79.00. Cox died on 20 February 1926, and his son, Dublin solicitor Arthur Cox, oversaw his father's bequest of the manuscript to
University College Dublin on 23 March 1926, "to be perpetually preserved in its library." During the 20th century, it was consulted by various scholars, including
Eoin MacNeill,
Eleanor Knott, and Father
Paul Walsh. The study by Ó Muraíle commenced in 1971; this process ended with its publication in five volumes by De Burca Books in 2004. ==Personal life==