William Strunk, Jr., The Importance of The Ghost in Hamlet (1910)
“ Suppose the ghost had merely told Hamlet of the murder, what would have happened? Again, the ghost does not demand immediate revenge, nor does he specify the form. The act may be pursued as Hamlet thinks best. And to Shakespeare's audiences there could be no possible doubt as to the meaning of "revenge." Violent death, at Hamlet's hands, no more and no less, is what the ghost demands. The ingenious theory of Werder, according to which Hamlet's duty was to defer vengeance until he was in a position to convince all Denmark that it was righteously taken, finds no support in the ghost's words. ”
