http://oaks.nvg.org/sa5ra17.html
Neat anecdote amongst a slew of Einstein-related trivia, which I here shamelessly steal from RufusAndRemus:
One of Einstein’s colleagues asked him for his telephone number one day. Einstein reached for a telephone directory and looked it up. “You don’t remember your own number?” the man asked, startled. “No,” Einstein answered. “Why should I memorize something I can so easily get from a book?” In fact, Einstein claimed never to memorize anything which could be looked up in less than two minutes.