The Hunting of the Snark based on a draft by Lewis Carroll, the Snark was allowed to show up in an illustration by Henry Holiday, where it appeared in a dream of the Barrister. The illustration to the chapter "The Banker's Fate" might contain pictorial references to the etching "The Image Breakers" by Marcus Gheeraerts the Elder, to William Sidney Mount's painting "The Bone Player" and to a photograph by Benjamin Duchenne used for a drawing in Charles Darwin's "The Expression of Emotions in Man and Animals". Upon the printing of the book on 29 March 1876, Carroll gave away eighty signed copies to his
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: