Sandy Run Watershed and the Holmesburg Water Works
Roberts Mill, Wingohocking Creek, 1871
Wingohocking Sewer across Penn St.
History of Belfield (1934)
Schuylkill River Hydrographical Survey 1861-66 by H. P. M. Birkinbine
View of Fairmount Water Works, ca. 1827
Plan of Lemon Hill and Sedgley Park, Fairmount and Adjoining Property, 1851
Penn’s Treaty with the Indians (Watson’s Annals)