Benjamin David Gosschalk worked as a manservant in the Apeldoornse Bos, where he began working on 1 July 1942.
Municipal Archives Apeldoorn, list of employees of the Apeldoornsche Bosch
In addition, a Jokos file (number 4817) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.