William Fitzhugh, Jr. (c.1760–1839), was a son of Col. William Fitzhugh (1721–1798) by his second wife, Ann Frisby Rousby Fitzhugh. He served as an officer in the 3d Continental Dragoons during the Revolution. After the war he moved to Hagerstown, Md., where he remained until about 1800, when he moved his family to Livingston County, N.Y. Col. William Fitzhugh had written GW on 25 July that he had to attend a land sale in Virginia on 20 Sept. and intended stopping at Mount Vernon (DLC:GW). Before leaving Mount Vernon, he paid GW £10 for the use of the treasurer of the Potowmack Company (General Ledger B description begins General Ledger B, 1772–1793. Library of Congress, George Washington Papers, Series 5, Financial Papers. description ends , folio 204). He also collected £46 17s. 9½d. from GW for some surplus building materials he sent GW earlier (Fitzhugh to GW, 13 May and 25 July 1785, DLC:GW; General Ledger B description begins General Ledger B, 1772–1793. Library of Congress, George Washington Papers, Series 5, Financial Papers. description ends , folio 204).