[…] when thou seest that act afoot,Even with the very comment of thy soulObserve my uncle. If his occulted guiltDo not itself unkennel in one speech,It is a damned ghost that we have seen, […]
c. 1599–1602 (date written), William Shakespeare, “The Tragedie of Hamlet, Prince of Denmarke”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act III, scene ii]