1779 Revolutionary War-era map of Philadelphia and environs
Centennial Exhibition situation plan, 1876
Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia
Electric Pump Installations at Lardner’s Point Pumping Station
Fairmount Park, bird’s eye view from Lemon Hill, detail
Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia, 1912
Leslie’s Illustrated Newspaper, Schuylkill Flood 1869
Lancaster/Schuylkill Bridge (Upper Ferry Bridge)
Race Bridge, Fairmount Water Works, 1834
Plan of Lemon Hill and Sedgley Park, Fairmount and Adjoining Property, 1851
