The Hunting of the Snark Wonderland", and mentions of "candle-ends" and "toasted cheese" with his supernatural poem "Phantasmagoria". Additionally all three works include the number "42". Another of Carroll's children's novels, "Sylvie and Bruno Concluded" (1893) makes a reference to the Boojum. Other illustrators of "The Hunting of the Snark" include Peter Newell (1903), Edward A. Wilson (1932), Mervyn Peake (1941), Aldren Watson (1952), Tove Jansson (1959), Helen Oxenbury (1970), Byron Sewell (1974), John Minnion (1974), Harold Jones (1975), Ralph Steadman (1975), Quentin Blake (1976), Frank Hinder (1989) and Brian Puttock (1997). "The Hunting of the Snark" has seen various adaptations into musicals, opera, theatre,
What the Tortoise Said to Achilles What the Tortoise Said to Achilles "What the Tortoise Said to Achilles", written by Lewis Carroll in 1895 for the philosophical journal "Mind", is a brief allegorical dialogue on the foundations of logic. The title alludes to one of Zeno's paradoxes of motion, in which Achilles could never overtake the tortoise in a race. In Carroll's dialogue, the tortoise challenges Achilles to use the force of logic to make him accept the conclusion of a simple deductive argument. Ultimately, Achilles fails, because the clever tortoise leads him into an infinite regression. The discussion begins by considering the following logical argument: