Dripps map of Frankford and vicinity, 1849
Schuylkill Navigation lock at Fairmount (Picturesque America)
Scenes on the Wissahickon Creek (Picturesque America)
Wissahickon Creek near the Paper Mill Bridge (Picturesque America)
Drive along the Wissahickon Creek Vallley (Picturesque America)
Map Lovers’ Monday: 1896 Suburban Transportation Map
Mount Moriah Historic Cemetery and Arboretum
Map Lovers’ Monday: 1891 Water Supply Plan
Sometimes the backside is the best side
Diagram from sewage treatment plan for Philadelphia, 1912