The papers presumably came into the possession of Charles St Clair, 15th Lord Sinclair, after his marriage to James Chisholme’s daughter in 1802. Charles Chisholme was captain of the East India ship 'Gatton'; James and William Chisholme, his brothers, owned sugar plantations in Jamaica.

William Chisholme became the owner of Thomas's River, North Hall, Health Crawl and Breadland Pen in Clarendon, Jamaica, as well as owning a quarter share of Trout Hall, Green River, Troys and Chisholm's Mammee Gully pen in Jamaica, the latter estates being mainly owned by his brother James.