Important American artist (1915–1991) who was one of the leading figures of the abstract expressionist movement. Testy TLS, one page, 8.5 x 11, personal letterhead, November 28, 1978. Motherwell responds to a letter from Jerry Granat regarding a letter by Henri Matisse. In part: “I’ve been acquainted with Pierre Matisse, the artist’s son, for nearly 40 years, and knowing biographies, etc., of the artist are being written, I passed your letter on to his gallery to pursue the matter … as they wished…. I’m a painter, not a historian, and your information was of no particular use to me…. All I can do now is pass on your letter to Pierre Matisse, saying that in my opinion, if what you relate is true, it does not seem kosher to me.” Accompanied by an unsigned copy of Granat’s response to Motherwell. In fine condition. R&R COA. From the Jerry Granat collection.