"Washington (D.C.)" . . "Harpers Ferry (W. Va.)" . . . . "Chesapeake and Ohio Canal (Md. and Washington, D.C.)" . . . . . . . . "Nonfiction films" . . . . "Shorts" . . . . . "Short films" . . . . . . . . . . "Actualities (Motion pictures)" . . . . "Down the old Potomac" . . "Follows a week-long, 180-mile trip on the Chesapeake and Ohio Canal through the Potomac Valley from Cumberland, Md., to Washington, D.C. Includes scenes of the locks in operation; a mile-long, hand-dug tunnel which was built in 1840; coal barges plying the canal; Maryland farming country; Harper's Ferry; and Great Falls." . "Travelogues (Motion pictures)" . . . . . . "Travelogues" . "Follows a week-long, 180 mile trip on the Chesapeake and Ohio Canal through the Potomac Valley from Cumberland, Md., to Washington, D.C. Includes scenes of the locks in operation; a mile-long, hand-dug tunnel which was built in 1840; coal barges plying the canal; Maryland farming country; Harpers Ferry; and Great Falls." . "Travelogue" . . . "Great Falls of the Potomac (Md. and Va.)" . . "Potomac River Valley." . . "Maryland" . .