A collection of 19th-century transcripts from early Irish law tracts in manuscripts from Trinity College, Royal Irish Academy, the Bodleian and the British Museum. It consists of 17 volumes that were written by John O'Donovan and Eugene O'Curry for the Brehon Law Commission.
- s. xix
- John O'Donovan, Eugene O'Curry
- s. xvii
- Tuileagna Ó Maoil Chonaire, Conas Ó Dubhda
- s. xvii (?)
Composite manuscript consisting of vellum manuscripts and two parts of paper (pp. 17-36, 129-219).
- s. xv-xvi
Two leaves, now in Dublin, Trinity College, MS 1436, which formerly belonged to the Book of the White Earl (see Oxford, Bodleian Library, MS Laud Misc. 610, ff. 59–72 + 123–146). It contains a part of the Dinnshenchas Érenn, covering ten places in Ireland.
- 1453 x 1454
- s. xvii2
- Seán mac Torna Ó Maoil Chonaire
A twelfth-century Irish fragment (6 ff) of Boethius's De institutione arithmetica, containing Latin glosses and a single Middle Irish note (f. 5ra)
- s. xii
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