Six volumes containing some 700 letters arranged in alphabetical order of correspondents, from and to George Petrie, concerned largely with antiquities, and including letters from W. Allingham, J. N. Brewer, Lord Dunraven, G. Downes, John O'Donovan Eugene O'Curry, Edward Clibborn, and Thomas Larcom, 1824-66.

Míreanna comhchosúla

• Obituary of Sir Thomas A. Larcom.
  Foilsithe / Cruthaithe: (1877)
• Correspondence between Larcom and Petrie on matters relating to the Ordnance Survey Memoir, 1838 - 1844.
• Query: Did the third volume of the "Beauties of Ireland" by J. N. Brewer, ever appear. Answered that J. P. Anderson of the British Museum Library says "no".
  de réir: Exile
  Foilsithe / Cruthaithe: (1913)
• Obituary of Edward Clibborn.
• Royal Irish Academy: Letter from Sir Thomas A. Larcom dated May 6, 1865, informing the Academy of an increase of £200 in its grant from the Treasury.
  Foilsithe / Cruthaithe: (1864)