Roberts Mill, Wingohocking Creek, 1871
Early visions of Philadelphia’s airport
Report on channelization of Frankford Creek for flood control (1947)
Down Under, Part 2: Beaver Creek as it appears today
Cobbs Creek in the Days of the Old Powder Mill
19th century life in South Philadelphia’s marshland
Plan of Lemon Hill and Sedgley Park, Fairmount and Adjoining Property, 1851
Penn’s Treaty with the Indians (Watson’s Annals)
