sentences:  That was his final race in the U.S. On Jan. 28, 1940, at age 13, one of the toughest iron horses of all time closed out his gallant career—a marathon in itself—by running second at Agua Caliente.His final paycheck was $100; his legacy, a claimer's place in the pantheon of sound, stout-hearted stakes horses—and in the hearts of a devoted public.