Earliest extant copy of the Annals of Clonmacnoise.
- Anonymous [scribe of Armagh, Robinson Library, MS A], Roderic O'Flaherty
A lost source named for Dub Dá Leithe, abbot of Armagh (fl. 1049-1064). It is referred to by the Annals of Ulster, s.a. 630, 963, 1004 and 1021, and the copy of Baile in Scáil in Rawlinson B 512, f. 101r.
- s. ximed
Paper manuscript compiled for Robert Shipboy MacAdam in the middle of the 19th century, containing a substantial, alphabetically arranged collection of materials made in preparation for an English–(Ulster) Irish dictionary. The project was undertaken by MacAdam, who worked together with Aodh Mac Domhnaill, a native speaker from County Meath. The manuscript consists of 23 (port)folios, lacking letter F and the beginning of G, and numbers around 1145 pages. The dictionary remained unpublished.
- 1842 x 1856