371. SAMUEL P. LANGLEY (1834-1906) American aviation pioneer who explored the possibility of flight by heavier-than-air machines and actually succeeded in inventing such a machine which flew over the Potomac for 3,000 feet. A.L.S. "S. P. Langley" on Smithsonian Institute letterhead, 1p. 8vo., Washington, [n.d.], sending the address of Lucy H. Baird. Fine. Matted with two photos and a brass plaque, set into a wood frame.
$300-400