Blake and Joe began grinding away at the camera cranks, with their helper to assist them. Charles Anderson was more than a paid employee of the moving picture boys. He was a friend as well, and had been with the "firm" some time. He was devoted and faithful, and a good camera man himself, having helped film many large productions.
In spite of what he had said, Blake Stewart was somewhat impressed by what Charles had told him. And for the next few days, during which he was busily engaged on retaking the films, he kept as close a watch as he could on Lieutenant Secor. However, the attitude and conduct of the Frenchman seemed to be above suspicion. He did not carry out his intention, if he really had it, of seeking permission from the commanding officer to observe more closely the work of Blake and Joe. And for a few days before the last of the new films had been taken the blue-uniformed officer was not seen around the camp.
Blake and Joe were too busy to ask what had become of him. Then, too, other matters engaged their attention. For a letter came from Mr. Hadley, telling them and Charles to hold themselves in readiness to leave for England at any time.
"It's all settled," wrote the producer. "I have signed the contracts to take moving picture films of our boys in the French trenches, and wherever else they go on the Western front. You will get detailed instructions, passes, and so on when you arrive on the other side."
"When do we sail?" asked Joe, after Blake had read him this letter, and when they were preparing to go back to New York, having finished their army camp work.
"The exact date isn't settled," answered his partner. "They keep it quiet until the last minute, you know, because some word might be flashed to Germany, and the submarines be on the watch for us."
"That's so!" exclaimed Joe. "Say, wouldn't it be great if we could get one?"
"One what?" asked Blake, who was reading over again certain parts of Mr. Hadley's letter.
"A submarine. I mean film one as it sent a torpedo to blow us out of the water. Wouldn't it be great if we could get that?"
"It would if the torpedo didn't get us first!" grimly replied Blake. "I guess I wouldn't try that if I were you."