Roberts Mill, Wingohocking Creek, 1871
Drainage area plan, early 19th century
Early visions of Philadelphia’s airport
Down Under, Part 2: Beaver Creek as it appears today
Fairmount Water Works from the forebay, 1833
19th century life in South Philadelphia’s marshland
Delaware River at Arch Street from the New Jersey side, 1914
State House Garden, Philadelphia, 1800
The City and Port of Philadelphia on the River Delaware from Kensington, 1800
Philadelphia the Manufacturing and Industrial Capital map, 1906