Wingohocking Sewer across Penn St.
Mill Creek Sewer under construction, 1883
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
Schuylkill River Hydrographical Survey 1861-66 by H. P. M. Birkinbine
Fairmount Park, bird’s eye view from Lemon Hill, detail