Hartog Isaäc van Gelder was known as Harrie. He lived at the Paviljoen Loosdrechtse Rade youth aliyah home in Loosdrecht from 1 April 1942 until 7 December 1942. He went into hiding. He was caught in Het Witte Paard, on the heather between Loosdrecht and Hilversum.
F. van der Straaten, Om nooit te vergeten. Herinneringen en belevenissen aan/van Palestina-Pioniers in Nederland gedrurende de oorlogs…