- s. xi/xii
This volume, edited by Ranke de Vries, contains editions of two important texts related to the mythological origin of Lough Neagh and its aftermath. The earlier of the two texts, De causis, contains a seventh-century poem by Luccreth moccu Chíara that can be regarded as the earliest example of deibide. The second, Aided Echach, is a prosimetric text found only in Lebor na hUidre (in the hand of the interpolator H). The editions are preceded by a general discussion on the development of the tradition concerning the origin of the lake.
Contents: Part 1 (chapters 1-23): Allgemeines; Part 2 (chapters 1-85): Die Ulter Sage.
Pwyll y Pader ar Gredo and the Credo with commentary. The final part of f. 11r-v is illegible.
- s. xiv
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 The dictionary remained unpublished.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
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