I am deeply saddened to learn of Layton's death. He was my best friend for many years in high school, and we roomed together for two years at Princeton. Layton's enthusiasm and general high spirits enlivened many hilarious adventures, many of which he instigated. But we were true partners in these madcap enterprises, and while I blush to recall some of them, we had enormous good fun together. He will be sorely missed, an irreplaceable free spirit. My heart goes out to his family.