Following the war, in 1785, Marshall moved to Kentucky with his father and many siblings, since soldiers received land claims as bounty, and his father had become surveyor for Fayette County. Marshall also emulated his eldest brother
John Marshall and
read law. Admitted to the Virginia bar in 1788, Marshall began a private legal practice in
Fayette County,
District of Kentucky,
Virginia (State of
Kentucky from June 1, 1792). He moved to the new federal city (now the
District of Columbia) and continued private legal practice in
Alexandria (the part ceded by Virginia to create the new capital and which decades later returned to Virginia) until 1801. The Supreme Court decision in Martin v. Hunter's Lessee in 1816 affirmed the Marshall brothers' purchase of the Fairfax lands, and thus allowed them to remove squatters and resell the land they had cleared. This made the Marshalls wealthy, and in the 1820 census, Marshall owned 39 slaves in Frederick County. The then made Fauquier County his main residence, and owned 47 slaves in the 1830 census. In the final census of his lifetime, after making provision for his children, he owned 32 slaves in Fauquier County. ==Federal judicial service==