 As a result, he was appointed by Catherine (Culpeper) Fairfax, Lady Fairfax, who was living in England, as her agent and resident manager for the Northern Neck Proprietary, which she had inherited from her father, Governor Thomas Colepeper, 2nd Baron Colepeper.Catherine was the wife of Thomas Fairfax, 5th Baron Fairfax.This property, which consisted of approximately six million acres (24,000 km²), included all the land between the Potomac and Rappahnnock rivers.