During this time not a word was spoken except by the watch officers, who were at their posts like the rest of the crew, and reported to the commander the directions in which the bombs were falling, thus enabling him to move the boat about in a safe course. The bombing continued until nightfall. Then the commander thought he was safe. But the next day, another American warship appeared, and the U-90 made for its home port as fast as possible. Lieutenant Isaacs, more fortunate than many U-boat prisoners, was treated well by the officers and crew. He messed with the officers and heard them most of the time discussing why the United States entered the war. They told Isaacs that the only possible reason was that the United States had loaned so much money to the Allies that she was obliged to enter the war to make sure of being repaid. But Isaacs had no intention of remaining in the U-boat. As it entered neutral waters about four miles off the Danish coast, it began running along above the surface. Isaacs secretly left his room, hurried to the deck, and was just about to dive over into the water, hoping to swim ashore, when Captain Remy, the commander, caught hold of him. He had suspected Isaacs and had followed him from below. "Stupid fool," he exclaimed as he drew him away from the side of the boat and ordered him below. On landing at Wilhelmshaven, Isaacs was questioned by German intelligence officers, and then sent to Karlsruhe where he was again examined with the hope that he would give out information which would be valuable to the Germans. Here with several other prisoners, he was held for three days in a "listening hotel" where dictographs had been strung about the room. The German officers hoped that, left without guards in the room, the prisoners would talk over military matters, not knowing that the dictographs were there to record all that was said and thus reveal all to the Germans. But the prisoners expected some trick, discovered the dictographs, and pulled out the wires so that they would not work. Isaacs remained in Karlsruhe for some time, then was placed on a train with several officers and started for the prison camp at Villingen in Baden. At Karlsruhe he had been shamefully treated and he determined he should never arrive in Baden. On the train he was put in the charge of two guards and so closely was he watched that he despaired of having any chance to escape. But within five miles of his destination, he noticed that one guard became drowsy, while the other had his attention on the passing landscape.