Henry Moore, — Moore, Henry: Complete Graphic Work 1972-1974 catalogue.

NY, Wildenstein, 1974. VG lg sz PB. "It was my wife who reminded me that I had told her I wanted to make drawings of the elephant skull and who suggested I should. make etchings instead.The first day I drew the whole skull.to find out its general construction, gradually I became amazed at the complexity of it and my interest and excitement grew greater each day I worked.".