Austin was the half-brother of Oney Judge. He married another dower slave at Mount Vernon, possibly a seamstress named Charlotte. (Moll, whom some historians have assumed had been his wife, was about 18 years his senior.) Austin seems to have been a stableworker at the presidential residences in New York City and Philadelphia. In the President's House, he probably slept in the slave quarters adjoining the stables, with Giles and Paris.
Austin died on December 20, 1794, after a fall from a horse near Harford, Maryland. He was survived by his widow and five children: two sons, Billy (born ca. 1782), Timothy (born 1785), and three daughters, Elvey, Jenny and Eliza (born between 1786 and 1795). Austin's children seem to have been inherited by G. W. Parke Custis after Martha Washington's death in 1802, and probably were moved to Arlington House (now Arlington National Cemetery). It is not known what became of his widow.
(This biographical sketch is partially based upon the unpublished work of Mary V. Thompson, Research Specialist, Mount Vernon Ladies' Association.)