Thomas Bishop (c.1705–1795) came to America with Edward Braddock’s forces in 1755, and became GW’s personal military servant in the army in the fall of that year. Bishop served in that capacity throughout most of the French and Indian War, and subsequently worked at Mount Vernon from 1761 until the time of his death.  For a time, in the late 1760s, Bishop acted as overseer of Muddy Hole farm at Mount Vernon, but even before GW left for war in 1775, Bishop seems to have been relegated to performing occasional tasks for the estate manager, Lund Washington. 

Bishop's wife, Susanna (d. 1785), acted as a midwife at Mount Vernon, where, from 1766 until her death, she delivered most of the babies born to slave mothers.