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.
William Shakespeare (1823). “The Dramatic Works of William Shakspeare: From the Text of Johnson, Stevens, and Reed; with Glossarial Notes, His Life, and a Critique on His Genius & Writings”, p.920
William Shakespeare (1996). “The Tragedy of Hamlet, Prince of Denmark: A Facing-pages Translation Into Contemporary English”, p.4, Lorenz Educational Publishers