That is Don on the left sitting just above Jackson Pollock. To the right of Pollock is John Sloan, their teacher at the Art Students League. Photograph from 1930-31. Other people still to be identified. (Better resolution photo coming....)
Photo at the Art Students League, around 1930-31. That is Jackson Pollock just above the woman in the middle sitting. Other persons still to be identified. Don is not in this photo but is in the accompanying photo.