![“Long stairway in mill district of Pittsburgh, Pennsylvania,” 1940. Medium-format nitrate negative by Jack Delano. [Shorpy]](http://24.media.tumblr.com/tumblr_kx2z54siCt1qakblyo1_500.jpg)
“Long stairway in mill district of Pittsburgh, Pennsylvania,” 1940. Medium-format nitrate negative by Jack Delano. [Shorpy]
“Long stairway in mill district of Pittsburgh, Pennsylvania,” 1940. Medium-format nitrate negative by Jack Delano. [Shorpy]
