LS, one page, 5.25 x 8.5, Langham Hotel (London) letterhead, November 20, 1880. Letter to engineer Conrad W. Cooke: "I am sorry to be obliged to leave London without seeing you and hope to have the pleasure of meeting you upon my return next week." Double-matted with an engraved plate and a touched-up photo of Bell at the opening of the long-distance line from New York to Chicago in 1892; framed to an overall size of 30.5 x 15.75. In fine condition.
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