 At Martin's suggestion, Lord Fairfax relocated the proprietary's base of operations northwest from Belvoir to an expressly built land office depository and archive at Greenway Court in 1762.Prior to this move, a small land office had been in operation at Greenway Court.Following William Fairfax's death in 1757, his son George William Fairfax (1729–1787) had succeeded him as steward and land agent of the proprietary.