Sigmund Freud, Stanley Hall, Carl Gustav Jung, Abraham Arden Brill, Ernest Jones and Sándor Ferenczi. Photograph, 1909.

Licence: Public Domain Mark

Credit: Sigmund Freud, Stanley Hall, Carl Gustav Jung, Abraham Arden Brill, Ernest Jones and Sándor Ferenczi. Photograph, 1909. Wellcome Collection. Source: Wellcome Collection.