28. Morning clear & pleasant & continued so all day. Mer. 39 in the Morng. & 40 at Night. The Atty. Genl. U.S. Mr. Jno. Hopkins & Mr. Chs. F. Mercer dined here & returned.
Charles Fenton Mercer (1778–1858), younger son of James Mercer (1736–1793), graduated from Princeton in 1797 and eventually settled at Aldie in Loudoun County. Mercer, who had a distinguished political career, later became the first president of the Chesapeake and Ohio Canal Company after it succeeded the Potowmack Company in the 1820s.