Letters addressed to Rev. Dr Alexander Irvine, and drafts of letters in his own hand. See John Mackechnie, 'Catalogue of Gaelic Manuscripts in selected libraries in Great Britain and Ireland', 2 volumes (Boston 1973), volume 1, page 338, numbers 8-17 (quoted below as Mackechnie).

Draft of a letter, 11 October 1808, of Irvine to an unnamed correspondent, mainly reporting on his Ossianic investigations. 2 folios, quarto, partly cross-hatched. Mackechnie, no. 8.

Draft of a letter, paper date 1806, of Irvine to an unnamed correspondent, containing a report probably for the Highland Society of Scotland on a manuscript written by Hugh Maclean, dated 1692-1698. From the description, this is likely to be NLS MS.14873. 2 folios, folio. Mackechnie no. 9.

Draft of a letter, 1802, of Irvine to an unnamed correspondent, docketed by him: "Letter on the poems of Ossian, 1802." 2 folios, quarto. Mackechnie no. 10.

Letter, 10 September 1802, of Rev. James McLagan to Irvine, concerning an English translation of a song to which Irvine also has the air. 1 folio. Mackechnie no. 11.

Letter, June 12 [1806], to Irvine from Malcolm Laing, enclosing a letter, 20 May 1806, of John MacDiarmid to Henry Mackenzie concerning Ossianic matters. 7 folios, quarto. Mackechnie no. 12.

Document, 1800?, headed "Questions to which it is wished to obtain answers from Alexander Morison formerly of the Island of Sky afterwards a Captain wih the North Carolina Royalists & now residing at Greenock." Concerning his knowledge of Ossianic poetry and acquaintance with James Macpherson. 2 folios, quarto. Mackechnie no. 13.

Letter, 12 March 1807, of Henry Mackenzie probably to Irvine, concerning Malcolm Laing and Rev. James MacDiarmid. 2 folios, quarto. Mackechnie no. 14.

Draft letter, [1807], of Irvine in response to Henry Mackenzie's letter above. With an enclosed copy made by Irvine, docketed by him "Deposition. Mr McDiarmid Weem in causa Ossian 8 April 1807". 3 folios, quarto. Mackechnie no. 15.

Fair copy and draft of letter, 23 December 1808, of Irvine to Sir John Sinclair, concerning the new translation of the poetry of Ossian. With 4 printed specimen pages, annotated by Irvine. 5 folios. Mackechnie no. 16 (a-c).

Letter, 28 September 1808, of Sir John Sinclair to Irvine. Written by a clerk. Asking Irvine to take down poetry from the recitation of two tradition bearers in his area. 2 folios, quarto. Mackechnie no. 17.