	In 1791 Keir wrote, at the special desire of the widow, a memoir of his friend Thomas Day, author of "Sandford and Merton". During the same year Keir's avowal of sympathy with the French revolution at a public dinner on 14 July exposed him to much virulent abuse. He defended himself and Priestley in various pamphlets, such as the "Extinguisher Maker", "T. Sobersides", and "High Church Politics". In 1793 Keir published a pamphlet entitled 'The Martial Character of Nations,' arguing that the French were not likely to become so pacific as to make national defence less necessary. Ten years later he wrote "Reflections on the Invasion of Great Britain by the French Armies; on the Mode of Defence; and on the useful application of the National Levies" (1803).