 It was in his book "The Interpretation of Dreams" ("Die Traumdeutung"; literally "dream-interpretation"), first published in 1899 (but dated 1900), that Sigmund Freud first argued that the motivation of all dream content is wish-fulfillment (later in "Beyond the Pleasure Principle", Freud would discuss dreams which do not appear to be wish-fulfillment), and that the instigation of a dream is often to be found in the events of the day preceding the dream, which he called the "day residue.