Mexican painter (1883–1949) who specialized in bold murals that established the Mexican Mural Renaissance along with the likes of Diego Rivera and David Alfaro Siqueiros. ALS in Spanish, signed “J. C. Orozco,” one page, 5.5 x 7.25, January 15, 1946. Letter to Miss Marjorie May. In part (translated): “Thank you very much for the letter and invitation. Unfortunately it is impossible for me to accept because I have to see a friend near Boston.” Partial separations to central mailing fold (reinforced on the reverse), uniform toning, and tiny stains at top and bottom edges, otherwise fine condition. RR Auction COA.