Playwright Constance O’Hara, in her memoir Heaven was Not Enough, recalls when her family moved to West Philadelphia in the early 1920s:
“We bought a vast house on Baltimore Avenue, its from windows flooded with sunshine, its back rooms dark and damp. It faced Clark Park which seemed like the wilds of the country.”
John Edgar Wideman’s novel Philadelphia Fire includes numerous passages about Clark Park. You can find those passages on Google Books at http://books.google.com/books/about/Philadelphia_Fire.html?id=rQDlcSlYtY8C , but you really ought to buy the book.