Purimfestivies at the kindergarten K&G at Nieuwe Keizersgracht in Amsterdam on March 12, 1939. From left to right Jaap Marcus, Marcel Stuiver, Rudie Kattenburg, Jopie (surname unknown), Sieg van Tijn, David Waterman en Leo Kattenburg N.I.W (New Israelitic Weekly)
Jacob Hijman Marcus was in hiding with his aunt Roosje Matteman (1907-1945) in Amsterdam. They were arrested on 8 June 1944, as indicated in a post-war statement from the father of Jacob Hijman Marcus. This post-war statement remains.
Jewish Historical Museum, Documents collection, inv.nr 7172
In addition, a Jokos file (number 15731) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.