One page, 4to, written on the blank integral leaf of a printed prospectus for the Lowell Scientific School, where Gray taught." /> [AMERICAN BOTANISTS]. GRAY, Asa (1810-1888). Autograph letter signed ("A. Gray") to Leander Wetherell, Cambridge, Mass., 6 March 1848. <I>One page, 4to</I>, written on the blank integral leaf of a printed prospectus for the Lowell Scientific School, where Gray taught. | Christie's