Schuylkill Navigation lock at Fairmount (Picturesque America)
Wissahickon Pipe Aqueduct, Roxborough to Mt. Airy, 1868
Northeast Philadelphia history, one page at a time: The Holmesburg Library Scrapbook Collection
Fairmount Water Works, W.H. Bartlett, 1839
Race Bridge, Fairmount Water Works, 1834