News at Eleven: [William] McGonagall also fancied himself

an actor although (perhaps understandably) his services were seldom in demand. On one occasion, he paid the Director of a theatre to be allowed to play the title role in Macbeth. McGonagall persuaded sufficient friends and acquaintances to attend the play as to avoid a financial disaster. But it was not an artistic triumph; at the end, when Macduff should kill Macbeth, McGonagall became convinced that the actor playing Macduff was deliberately trying to upstage him, and he refused to die.

from National Post: Ian Hunter on William Topaz McGonagall, the world's worst poet

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