I wonder if the photos are from the book "Quarry: A Collection in Lieu of Memoirs of Lincoln Kirstein."
Suggest a reading in April 16, 2007 regarding Lincoln Kirstein; his complex life, his grand ego,
(he installed the "fantastic overscaled Nadelman sculpture" , of himself on the NYCB theatre promenade).
No matter how long and how hard Kirston tried, he confesses to never being close to Bal,, Read it!