First line index to catalogues of mss. in the Royal Irish Academy by Owen Connellan, Paul O'Longan and Joseph O'Longan, with later additions by Eleanor Knott, from slips made by W. J. Purton.

Míreanna comhchosúla

• Obituary of Joseph O'Longan.
  Foilsithe / Cruthaithe: (1877)
• Late Joseph O'Longan and his family.
  Foilsithe / Cruthaithe: (1880)
• General index to the catalogues of Irish mss. in the Royal Irish Academy, in the handwriting of Joseph O'Longan, 1869.
• Transcript by Joseph O'Longan, of Mss. G. 113 and G. 114
• Catalogue of (some) of the Hudson manuscripts in the Royal Irish Academy by J. O'Longan, 19th c.