 He and Xenia spent the summer of 1942 with dancer Jean Erdman and her husband Joseph Campbell.Without the percussion instruments, Cage again turned to prepared piano, producing a substantial body of works for performances by various choreographers, including Merce Cunningham, who had moved to New York City several years earlier.Cage and Cunningham eventually became romantically involved, and Cage's marriage, already breaking up during the early 1940s, ended in divorce in 1945.