Garth had lifted Alden to the sofa and had left Nora hovering over the man who, they knew now, had been systematically drugged for days. After reconnecting the telephone and notifying the federal authorities he had returned to the living-room. Nora arose, and, with her finger at her lips, joined him by the fireplace.
"He's asleep," she said. "You know, Jim, there wasn't much point in your telephoning. They've destroyed the evidence. They've gone."
She sat down. Garth drew a chair close to her. Their voices were low in order that Alden might not be disturbed.
"Was it near?" he asked. "The fact that they took the launch—yet they might put in at some lonely cove and scatter."
"It must have been expected soon," she answered. "They were working desperately. They were very anxious to-night."
"You must have guessed, Nora, as soon as I left New York. How?"
"By giving father a scolding," she answered with a smile. "I knew that Mrs. Alden had been born in Berlin, and that her family was still prominent there where Mr. Alden had married her. Even since her marriage she's spent much time abroad. I wondered what these shadowy figures were doing in the woods on foggy nights unless they were transporting something or working about some building. But Mr. Alden would know if it had anything to do with the house or the stable. Since he was sick, the boat-house might be their objective without his knowing it. I suspected the truth then. Such an opportunity! No one would doubt the property of a man who manufactured ammunition for the government. The natural thought was that any attempts by Germans here would be directed against the furnaces or Alden personally. It was ideal. All that was necessary was to scare the servants away and keep Alden in the house while his wife and the rest made ready for it."
"Still those men in the woods?" Garth asked.
"They were probably working at the furnaces. When you saw them they were on their way to the boat-house to make the necessary alterations. And, of course, they carried all the supplies there. You see, I went to the freight agent of the only railroad that runs to Deacon's Bay. He helped me a lot. We found that a large number of heavy cases had been sent here and to nearby stations, falsely invoiced and labelled to be called for. He had suspected gasolene in one of them and was about to hold up further shipments. That settled it for me. I knew you were going blindly, so I took the next train."
"How did you learn about the signal?" he asked.