"Main Line" . . . . "Pennsylvania Canal system" . . . "North Branch Canal" . "Pennsylvania Canal Company" . . . . . . . . . . "Pennsylvania Main Line Canal" . . . . "Pennsylvania Canal System" . . . . "canal era" . "Pennsylvania Canal" . . . . . "Eastern Division of the Pennsylvania Canal" . . "Pennsylvania Canal Commission" . . . . . . . . "Pennsylvania Canal" . "Erie & Pennsylvania Canal" . . . . . "Western Division Canal" . .