The City and Port of Philadelphia on the River Delaware from Kensington, 1800
Map of Philadelphia showing Population in year 1920
Map of the County of Philadelphia from Actual Survey, 1843
Outline Map of the County and City of Philadelphia and Vicinity, 1883
Philadelphia the Manufacturing and Industrial Capital map, 1906
Schuylkill River Hydrographical Survey 1861-66 by H. P. M. Birkinbine
Torresdale Conduit work gang, 12/18/1906
Bureau of Water, Cumberland, west of 13th Street, pipe line, 1907
State Street pipeline construction, 1904
Belmont Filters construction, 1903
