topic

• Enslaved persons1
• Hydrology1
• Slavery1
• Water-supply1
• More Less

name

• Graham, H. S. (Henry S.)1
• Hergesheimer, E. (Edwin)1
• Hering, Rudolph, 1847-19231
• Leonhardt, Theo. (Theodore), 1818-18771
• Philadelphia (Pa.). Water Department1
• More Less

collection

• Maps of North America2

place

• Pennsylvania1
• Philadelphia1
• Philadelphia (Pa.)1
• Philadelphia Region1
• Philadelphia Region (Pa.)1
• More Less

genre

• Maps2

publisher

• Census Office, Dept. of the Interior1
• Philadelphia Water Department1

division

type

• cartographic2