 He was a director of the Old East India Company from 1700 to 1702, 1703 to 1705 and 1707 to 1709, and became manager of the united trade company from 1707 to 1708.In 1698, the Dashwood brothers were able to invest £15,000 to buy the estate of West Wycombe from their brother-in-law Thomas Lewis.Francis Dashwood eventually bought out his brothers' share.