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: "Livy dear, a [<i>mouse</i>] kept me awake [<i>cobbler's last</i>] night"
Source format: "MS facsimile and transcript | typed transcription"