After studying biology at Cambridge (and receiving an undistinguished degree), he studied medicine at St. Bart’s during World War I, worked in pediatric hospitals, married Alice Taylor (in 1923; apparently a rather bad marriage), started a private pediatric practice, read and admired Freud, and, in 1923, began his analysis with James Strachey. His mother died in 1925. He became one of the first candidates in the British Psychoanalytic Institute in 1927, ended his Strachey analysis in 1933, graduated from the institute, got supervised by Melanie Klein, and at the same time analyzed her son. From 1936 to 1941, he had a second analysis, with the then rather Kleinian Joan Riviere. In 1941, he began working with Clare Britton, a social worker (and future analyst) working with children; about 1944 he apparently began an intimate relationship with her. In the late 1940s he had several heart attacks, his father died, and he separated from Alice (they had had no children together, although they had provided a home for two psychologically troubled foster children). Winnicott continued to write rather prolifically and wrote what is probably his most famous paper, on transitional phenomena (delivered, after delays, in 1951) (1). In December 1951, he married Clare, and this second marriage seems to have been largely successful and happy. From time to time several of his professional relationships—e.g., with Marion Milner, Melanie Klein, Masud Khan, and some severely ill patients—had what seem clearly to have been some burdensome problems with boundaries. Melanie Klein died in 1960. Winnicott went on writing energetically and creatively, traveled to America several times to give lectures, had increasing heart and lung problems and flu, and died Jan. 22, 1971.