"I would like to make clear...that Mr. Wright...was not interested in the plan proposed by our curator—a plan which involved a lucid chronological exposition of Wright's development, particularly as regards his handling of space. For six months, the Department of Architecture had been planning and working upon a catalog which would have comprised a great deal of factual and critical material, including essays by a half-dozen of the foremost architects and architectural historians in this country. Mr. Wright refused to permit the publication of the catalog as planned although it had been intended as a tribute to him. It was then too late to prepare a new publication. At the beginning of one of our conversations here at the Museum, Mr. Wright announced, 'I am a very difficult man.' We agree, but we still believe him to be the greatest living architect."
Alfred Barr's letter to the editor, Parnassus 13, no. 1 (January 1941): 3, as quoted by Richard Meyer in What Was Contemporary Art? (MIT, 2013)