This collection contains correspondence, reports, and memoranda relating to Sir Thomas Makdougall Brisbane's role in the War of 1812. The letters are largely to and from Sir George Prevost; General George Izard, the North American Commander; Major Edward Baynes; American General Alexander Macomb; Sir James Kempt; Sir Thomas Picton; and Francis de Rottenburg. The papers deal mainly with British plans to advance on Plattsburg, as well as orders and reports of troop movements, and proposals to attack various American positions. The collection contains a detailed plan, with maps, which Brisbane designed for the destruction of the American fleet at Whitehall, New York, in the winter of 1814.
Of special interest is a batch of letters from General Prevost that includes a confidential letter from Cadwallader Colden, a member of the American militia and Lieutenant Governor of New York from 1760-1762. The forward is a transcription of a letter written in invisible ink that details three ways of destroying the American Fleet at Whitehall.
Miscellaneous materials include a newspaper clipping dated October 25, 1814, that discusses the current state of the war, and a four-page printed General Orders document from Quebec, dated January 13, 1815, and signed Frederick.