Old News: Two unusual underground rescues
Map of Philadelphia Harbor, Delaware and Schuylkill, 1912
Birch’s Views of Philadelphia, 1800
Drainage area plan, early 19th century
Sassafras (Race) Street Survey, 1819
Pine Street sewer plan, 1848
Schuylkill River from below the South Street Bridge, 1873
Chestnut Street Bridge, on the Schuylkill River (Picturesque America)
Schuylkill River from below the South Street Bridge, 1873
Plan of Philadelphia, John Hills, 1796
