Jules Schelvis was a Dutch Jew who was deported to the Sobibór Camp on 1 June 1943. As he stated in a deposition in Amsterdam on 21 January 1946, this camp served as a transit camp for him: After he had arrived there, he was selected to join a group of 80 deportees who, after three hours, were transferred to Trawniki, and from there to Dorohucza for a labor assignment. He moreover found out about the alleged extermination activities at the Sobibór Camp only through the stories of an acquaintance who had escaped from the camp.
Despite his clear and unequivocal experience, he later became the most prolific orthodox historian of the Sobibór Camp, denying its role as a transit camp. Instead, he tried hard to force the massive body of contradictory and evidently false, if not to say mendacious, witness statements into the prevailing orthodox narrative.