This person is mentioned in a CABR document of the Dutch Nationaal Archief. The CABR contains detailed information concerning this person’s arrest, inv. nr CABR 74615
The Police Commissioner of Leiden requested that Machiel Vreeland, his wife Sientje Kops and their daughters Sara and Anna be located, detained and brought to trial. They were suspected of having changed their place of residence without the required authorization. This description referred to Jews who had gone into hiding. Algemeen Politieblad, nr 49, 10 December 1942, 1391, notice 3083