 His cousin Lord Fairfax moved to the Shenandoah Valley in 1752, fixing his residence at Greenway Court near White Post in Clarke County, at the suggestion of Thomas Bryan Martin.As George William Fairfax was a mentor to the young George Washington, the younger man spent considerable time at Belvoir before his marriage to Martha Dandridge Custis in 1759.From letters that have survived, it seems that Washington had fallen in love with Sally Cary before his own marriage.