 
		 
		 
		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)
