In 1935, Arnold van den Bergh auctioned the listed "Huis aan de Drie Grachten" ("House on three canals") building[7]—used from 1936 onwards for August Aimé Balkema's bookshop.

[10] In July 1940, he was the lawyer handling the sale of the Jacques Goudstikker art-collection to art dealer Alois Miedl for the benefit of Hermann Göring.

[11] Van den Bergh subsequently wrote to Goudstikker's wife, Dési von Halban, informing her the sale had occurred "in order to avoid great unpleasantness".

[15] In around October 1943 Arnold van den Bergh and his wife Auguste Kan went into hiding in Laren, their older twin daughters Emma and Esther to Noord-Scharwoude, and the third-daughter Anne-Marie to Sprundel (with some months spent in Breda).

[18] On 28 November 1946, Van den Bergh was one of the founding board members of the Jewish Social Work Foundation [nl] (JMW).

However, Professor Johannes Houwink ten Cate of the University of Amsterdam noted that Van den Bergh was also in hiding around the time of the raid on 4 August 1944.