Pic from Ariel S. Winter’s blog.
The following is a map of Harlem he drew in 1932 – at the end of the Jazz age.
To see more of the detail, here’s a larger version you can click on.
For more on E. Simms Campbell, check out the following link from
the Billy Ireland Cartoon Library and Museum.
Palayan City Found in the Collection: E. Simms Campbell Letters
There’s also a great retrospective at http://2ndchancesltd.com/removal-services/chislehurst/ Ariel S. Winter’s blog.