On May 21, 1752, shortly after Martin had come of age on his twenty-first birthday, Lord Fairfax granted Greenway Court to his nephew, along with 8840 acres of limestone lands on the west bank of the Shenandoah River across from Leeds Manor, which were "to be known and called by the name of the Manor of Greenway Court" and subject to an annual quit-rent fee of "a good buck and doe" due on the feast day of Saint Michael the Archangel.