light showing. There's no moon to-night, and they'll have pretty good eyes if they can follow me, unless they get a searchlight, and they won't do that for fear of giving themselves away.
"We'll sail off in the darkness, go to the spot we have previously picked out, and drop down to it. There we can hide and I don't believe they can trace us."
"But how can you find in the darkness, the spot you pick out in daylight?" Mr. Whitford wanted to know.
"I'll arrange some electric lights, in a certain formation in trees around the landing place," said Tom. "I'll fix them with a clockwork switch, that will illuminate them at a certain hour, and they'll run by a storage battery. In that way I'll have my landing place all marked out, and, as it can only be seen from above, if any of the smugglers are on the ground, they won't notice the incandescents."
"But if they are in their airship they will," said Mr. Damon.
"Of course that's possible," admitted Tom, "but, even if they see the lights I don't believe they will know what they mean. And, another thing, I don't imagine they'll come around here in their airship when they know that we're in the neighborhood, and when the spy who en-
