LS, signed “Alexander Graham Bell,” one page, 5 x 8, August 19, 1881. Letter, written in his wife’s hand, to Professor Oshen. In full: “Many thanks for your kind note of the 5th, with the little poem about Mr. McCurdy. I forward a few copies of my paper on binaural audition. I should be glad to have your ideas of the effects resulting from the semi-conductivity of the various substances we spoke about.” In very good condition, with scattered toning over portions of text and signature. Accompanied by the original mailing envelope. Pre-certified PSA/DNA and RR Auction COA.
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