Manuscript letters from Dalrymple to: Lord Morton, Court of Directors of the East India Co., Earl Spencer, Duke of Portland, Lord Grenville and G. Chalmers. Letters and papers include chart of the Pacific (printed) appearing in "A serious Admonition to the Publick on the Intended Thief Colony at Botany Bay", a memorandum suggesting transporting of convicts to Tristan da Cunta instead of Botany Bay, also papers concerning India and Cochin, China, etc.