1884 The Duke's version of Hamlet's soliloquy, combining elements of other speeches by Hamlet and pieces of Macbeth. The Adventures of Huckleberry Finn, ch.21.
Mark Twain (2010). “Adventures of Huckleberry Finn: The Only Authoritative Text Based on the Complete, Original Manuscript”, p.78, Univ of California Press
Mark Twain (2015). “Annotated Huckleberry Finn with English Grammar Exercises: by Mark Twain (Author), Robert Powell (Editor)”, p.160, Powell Publications, LLC