Van dit gezin is ook een JOKOS-dossier (nummer 13548) aanwezig op het Gemeentearchief van Amsterdam. Voor inzage is toestemming nodig van de stichting Joods Maatschappelijk Werk.
In this letter Leonard Wessel is explaining to the Dutch authorities that he is already paying a monthly contribution for his cousin or nephew Gert Heyman (born April 3rd, 1929) which is why he cannot sign a contract that they have just asked him to sign, in which he commits himself to paying for Gert's stay in the Netherlands. Source: Nationaal archief, 2.04.58, inv. 115