 It stayed in the Haldane family until it was sold in 1799 to Francis Simpson, a former captain with the East India Company.Simpson's wife Jean Sophia Cadell, daughter of William Cadell of Banton, was only twenty-one when she died in 1806, she left behind two children for Simpson to look after; one son, William, and a daughter, Frances.In 1819, Francis built Plean House and the other estate buildings.