 In 1750, Martin's uncle Lord Fairfax established himself at his hunting plantation Greenway Court estate near present-day White Post in Clarke County with the intention of administering the proprietary himself.Lord Fairfax had previously reserved this land as his private residence in 1747, then known as "the Quarter".With his cousin William Fairfax acting as land agent, Lord Fairfax sought additional assistance in managing the proprietary and scrutinized which of his family members from England would be up to the task.