Found image at Sotheby's website by Googling "steichen man child." Saw photograph in Steichen's legacy: photographs, 1895-1973. edited and with text by Joanna Steichen. New York : Alfred A. Knopf, 2000.
Breadline on Sixth Avenue, New York, circa, 1930
In the picture in the book details are clearer; it looks as if the park, or lot, in the lower right-hand corner is between 42nd and 43rd Streets, on 6th Avenue.