One-page handwritten letter, undated, signed by Jackie Robinson. PSA has encapsulated the letter and certified the signature and handwriting as "Authentic." In his letter, on his personal letterhead, Robinson writes to a Mr. Gabriel Mason and regretfully informs him that he cannot make a personal appearance. In full: "I am sorry but my schedule does not permit any morning engagements. I would be happy to attend any afternoon session. Arrangements can be made through our secretary at the Harlem Y.M.C.A." Signed "Jackie Robinson" in black ink (9/10). The letter (7.25x10.5") displays two horizontal mailing folds and a few very light creases.