American astronomer, physicist, and aviator (1834–1906), who conducted some of the first manned flights with his Army–funded Aerodrome aircraft. ALS signed “S. P. Langley,” three pages on two adjoining sheets, 4.25 x 7, The St. Botolph Club letterhead, April 24, 1894. Letter to Mrs. Michaelis, in part: “I would love to accept your invitation…I had a call yesterday from George and was pleased to see what a manly and intelligent young fellow he seems.” In fine condition. Pre-certified PSA/DNA.
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