A copy of O'Clery's glossary
- s. xviii(?)
- Seán Ó Murchadha [na Ráithíneach]
A copy of Cath Mhuighe Léana produced by Pádruic Mac Oghannan for Arthur Brownlow.
- Pádruic Mac Oghannan
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
Quires added to the original southern English manuscript of the Durham collectar and written for the most part by Aldred, priest at Chester-le-Street.
- s. x
Ó Cléirigh’s Book of genealogies, transcribed from RIA MS 23 D 17 by Seán Ó Cléirigh.
- Seán Ó Cléirigh [d. 1846], William Betham
19th-century transcript of Stockholm, Kungliga biblioteket, MS Vitterhet Engelsk II.
- s. xix
- William Betham