In recent years, I discovered, thanks to a physician friend who had known Leiser many years earlier, that he was alive and living in Zurich, Switzerland. And thus a correspondence began that took place over 9 years until his death. For the most part, our conversations were by telephone, almost on a daily basis and often several times a day. His wife, Ada, a painter, would write lengthy and beautiful letters. The drawings and paintings reproduced here are by Ada (see Plates 1 and 2).