27. Went up to four Mile run to view the Land bought of Mr. Mercer. Lookd at part of it, & returnd home at Night.
Four Mile Run is a small stream, about eight or nine miles long, which flows into the Potomac approximately four miles north of Hunting Creek. The land GW bought from James and George Mercer consisted of two patents, one for 378 acres and the other for 790 acres. These lands were deeded to GW 12 Dec. 1774 and proved 15 Oct. 1775. GW paid £892 for the two tracts (STETSON  description begins Charles W. Stetson. Four Mile Run Land Grants. Washington, D.C., 1935. description ends , 39–60).