Best map of Philly in the Rumsey collection

Stanford University Libraries just launched the Rumsey Collection, a historic archive of thousands of maps. Here’s the coolest map of Philadelphia I found in the archive.

See full image.

Some details I enjoyed…

Apparently there was a water works at the central square? (Then called the “Public Square”.)

The Navy Yard was quite literally a yard owned by the Navy.

Detail of Pegg’s Run, a long-hidden creek that in fact shaped much geography of my neighborhood, Callowhill. I’m hoping to write about Pegg’s Run more in the future.

This one confuses me. Washington Square and Market Square… in West Philly? What’s that oval?