A.F. van Ravesteijn (1922-2020) worked at a printing press in The Hague when he was sent to Germany for the ‘Arbeitseinsatz’ in 1942. He ended up in Recklinghausen, where they forced him to work in the administration of a labour camp. After his liberation, the British asked him to stay on because he had come to know a lot about German mining in the Ruhr area. In the late ’40s, Van Ravesteijn returned to the Netherlands and taught German.