Salomon van Dantzig was a son of Michel van Dantzig and Jetje Fles. He was born on 28 March 1883 in Rotterdam and he was working as an office clerk. His mental health left much to be desired: already in 1906 and in 1907 he was treated in the psychiatric hospitals "Oud Rosenburg" in Loosduinen and at "Coudewater" in Rosmalen. Up from the end of May 1912 till September 1914, Salomon stayed at two ad…