Submitted by Central Harlem Anonymous on Fri, 04/25/2008 - 5:46pm.
To my eye, the focal plane in this photo is not parallel to the lens. It is at an angle, farther back to the left bottom and closer on the right top. This suggests that the picture was taken with a camera that had bellows (perhaps a "field camera," see http://www.fiberq.com/cam/ for examples).
[Any of the view cameras used back then would have had an adjustable focal plane. - Dave]