The Forbidden Fountain of Oz food, which occurs most famously in the "forbidden fruit" of the Tree of Knowledge of Good and Evil in the Book of Genesis, but in other contexts too. The idea of water that purges the drinker's memory is also ancient. In Greek mythology it occurs as the river Lethe: the souls of the dead lose their memories of their earthly lives by drinking its water. The same idea can also be found in Eastern and other literatures, as in the "Well of the Waters of Forgetfulness" and other guises. "The 'Drink of Forgetfulness' is found in Greek, Hindu, Norse, and
Watcher in the Water attack on the Fellowship, and rupture of the Moria Gate are already present in his initial writings. Since Tolkien never explicitly stated what the creature is, others have felt free to speculate on its identity and origins. In "A Tolkien Bestiary", David Day calls the Watcher a kraken; but implies differences between the kraken of Scandinavian folklore and the Watcher in the Water. Tolkien never called the Watcher a kraken nor described the presence of krakens in Middle-earth. In "The Complete Tolkien Companion", J. E. A. Tyler postulates the Watcher was a cold-drake: "...these dragons rely on their strength and