In 1909, to observe the twentieth anniversary of Clark Universitys founding, its president, G. Stanley Hall (18441924), invited twenty-nine thinkers of international standing in the physical, biological, and social sciences to attend a conference there. Carl Jung and Sigmund Freud were among the eight invited to represent psychology and pedagogy. Freud delivered five lectures on psychoanalysis, and Jung delivered three lectures on the psychology of childhood, a topic he broadened considerably. Pictured at Clark are, seated (left to right), Freud, Hall and Jung, and, standing (left to right), three of Freuds followersA.A. Brill (18741948), Ernest Jones (18791958) and Sandor Ferenczi (18731933).