Some of the mail is from the crew of U-691, according to Bischoff. After Bischoff got them all here to Norrsbruck in one piece, his second in-command, Oberleutnant zur See Karl Beck, cut a deal with the Kriegsmarine in which the crew were allowed to return to Germany, no hard feelings, no repercussions. All of them except for Bischoff climbed on board what was left of U-691 and steamed off in the direction of Kiel.