Plans and maps of the Pennypack Creek Watershed in Philadelphia
The ecology of Center City, Philadelphia (in case you didn’t know there was any)
Requiem for a stream: Adams Run in Oak Lane
Smith and Windmill Islands
Cobbs Creek: A Brief Historical Overview
Streams, islands, and ferries of early Philadelphia
Delaware River at Arch Street from the New Jersey side, 1914
State House Garden, Philadelphia, 1800
The City and Port of Philadelphia on the River Delaware from Kensington, 1800
Pennypack Park and Creek map, Roland Williams, 2005
