Illustrator and muralist (1892–1985) whose work was quite agitational in nature. ALS, one page, 7.25 x 10.5, personal letterhead, November 16, 1960. Letter to Angelina de Sigueiros. In part: “We are working hard—Jack Levine and I—getting signatures on the petition to Mateos for the freedom of your husband. We are quite successful. To date we have 35 signatures of the leading artists, writers and musicians of the U. S.—we are aiming to have 50 at least.” Scattered creasing and toning, and a small pencil notation to top right, otherwise fine condition. RRAuction COA.