Harry Blok should had gone to class 1A of the HBS of the Jewish Lyceum in the Fischerstraat in The Hague, in schoolyear 1942-1943. However, Harry was transported to Westerbork during the first month of that schoolyear.
Wally de Lang, Slotakkoord der kinderjaren: herinneringen aan het Joodsch Lyceum Fischerstraat, Den Haag 1941-1943 (The Hague 2003).