 "The Nightmare" was widely plagiarised, and parodies of it were commonly used for political caricature, by George Cruikshank, Thomas Rowlandson, and others.In these satirical scenes, the incubus afflicts subjects such as Napoleon Bonaparte, Louis XVIII, British politician Charles James Fox, and Prime Minister William Pitt.In another example, admiral Lord Nelson is the demon, and his mistress Emma, Lady Hamilton, the sleeper.