  Also in 1928 he married Katherine Pressly Adams, from Lamar, Colorado, whom he had met at Berkeley, where she was something of a pioneer—a woman graduate student in psychology. In time, there were two sons to the marriage. The couple spent a year in Europe in 1928–29 (“immersing himself in Husserl’s Phenomenology to the point of immunization”, Firth, Nozick and Quine 1983, p 246). Then Donald began his life’s work as a Professor of Philosophy, first spending ten years at the University of California, Los Angeles, and then from 1939 until his retirement in 1967, at Harvard.