Giles accompanied Washington to Philadelphia in May 1787 for the Constitutional Convention, along with the general's body servant, Will Lee. The two black men probably stayed with Washington in Robert Morris's house, which 3 years later became the Philadelphia President's House. They returned to Mount Vernon in September.
Giles was brought to New York City in April 1789 to work in the stables of the presidential residence, and probably accompanied Washington on his Northern tour in October and November of that year. In Philadelphia, he almost certainly lived in the slave quarters adjoining the stables of the President's House. He drove the baggage wagon for Washington's Southern tour in March through June 1791.
Early in the tour, Giles was somehow injured so severely that he was no longer able to ride a horse, and was left behind at Mount Vernon when Washington returned to Philadelphia. Giles is not listed in the slave census done in June, 1799, which probably indicates that he had died.
(This biographical sketch is partially based upon the unpublished work of Mary V. Thompson, Research Specialist, Mount Vernon Ladies' Association.)