Bill Kass came to join Professor Peter R. Yankwich’s research group as a post doctorate after he graduated from Arizona. Dr. Yankwich was my thesis advisor. We invited Bill and his wife, Ann, to have dinner at our home. We liked them right away - they were easy-going and fun-loving people with open-minds. Later they learned how to play bridge. They progressed quickly in playing the game and we played quite a bit together. Bill later became a grand master in playing bridge in the USA.