Fairmount Park topographical map, showing East Park Reservoir, 1872
Plan of Philadelphia, John Hills, 1796
Images from ‘The Water Supply of the City of Philadelphia by a proposed Aqueduct from Norristown Dam’
Main Pumping Stations for Philadelphia Drinking Water
Plan of the City of Philadelphia and Adjoining Districts, 1830
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
1779 Revolutionary War-era map of Philadelphia and environs
