Edgemont at the New York Historical Society

If you want to see what Edgemont looked like back in the late 1700's, pay a visit to the Library at the New York Historical Society in Manhattan on 77th Street and Central Park West and visit the Erskine Dewitt Map Collection.  Robert Erskine was the cartographer (map maker) for George Washington. In one of his drawings from 1778, Erskine drew a map of the Greenville area showing three homes. One was the home of Joshua Hunt at what is near 221 Old Army Road today, and another is that of John Underhill at the corner of what is Underhill Road and Central Park Avenue today.
The only roads (or more accurately trails) were Old Army Road, Fort Hill Road and Ardsley Road (which was most likely an old Indian Trail that linked the area to the Hudson River).