Postcards—Maryland--Williamsport; Potomac River; Chesapeake and Ohio Canal (Md. and Washington, D.C.); Williamsport (Md.)--History--Pictorial works;
A view of the Potomac River and the Chesapeake and Ohio Canal from the Doubleday's Hill (named for the monument to General Doubleday) in Williamsport. The Potomac is the 21st biggest river in the United States. It flows mostly through Maryland and...