Wingohocking Sewer across Penn St.
Map of Frankford Borough, 1845
Philadelphia Navy Yard, July 1872
Darby, Delaware County, Pennsylvania, 1877
History of Belfield (1934)
Photos from the Philadelphia Anglers’ Club
Two Frankford Creek Bridges, 1896-1899
Centre Square Water Works, Drawings of Intake Basin
Centre Square Water Works, Frederick Graff, Sr. Plans, 1799
Centre Square Water Works, Latrobe Plans, 1799