Source: Mark Twain’s Letters. Edited by Albert Bigelow Paine. 2 vols. New York: Harper and Brothers. | University of California, Mark Twain Papers, The Bancroft Library, Berkeley ([CU-MARK])

Cue: "Mental Telegraphy has scored another. Mental"

Source format: "Transcript | Transcript"

Letter type: "[standard letter]"

Notes:

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Revision History: Tehrani, Michelle