"Yes. They could be on the roofs of houses, and masked, so that they wouldn't be seen except from overhead. They'd be in certain fixed positions, and the men on the Zeppelins would be able to calculate their aim, and drop their bombs so many degrees to the left or the right of the red marking lights."
"But we've got aeroplanes flying about, haven't we?" said Jack. "Wouldn't they see those lights and wonder about them?"
"Yes, if they were showing all the time. But you can depend on it that these Germans have provided for all that. They will have arranged for the Zeppelin to be above the positions, as near as they can guess them, at certain times–and the lights will only be shown at those times, and then only for a few seconds. Even if someone else sees them, you see, there won't be time to do anything."
"You must be right, Harry!" said Jack, nervously. "There's no other way to explain that message. How are we going to stop them?"
"I don't know yet, but we'll have to work out some way of doing it. It would be terrible for us to know what had been planned and still not be able to stop them! I wish I knew where Graves was. I'd like–"
He stopped, thinking hard.
"What good would that do?"
"Oh, I don't want him–not just now. But I don't want him to see me just at present. I want to know where he is so that I can avoid him."
"Suppose I scout into Bray?" suggested Jack. "I can find out something that might be useful, perhaps. If any of them from Bray Park have come into the village to-day I'll hear about it."
"That's a good idea. Suppose you do that, Jack. I don't know just what I'll do yet. But if I go away from here before you come back, Dick will stay. I've got to think–there must be some way to beat them!"