Donald Winnicott (1896-1971) was trained in paediatrics, a profession that he practiced to the end of his life, in particular at the Paddington Green Children's Hospital. He began analysis with James Strachey in 1923, became a member of the British Psycho-Analytical Society in 1935, and twice served as its President. He was also a Fellow of the Royal College of Physicians and of the British Psychological Society.