"Tut, tut, don't get fussed," said Bruce, trying hard to conceal his own suppressed excitement.

"All right, here goes," said Nipper as he turned the lamp switch, and a moment later the motor switch.

Instantly a long arm of light reached out across the valley and focused on the heavy growth of elm trees on the opposite hill side. The motor began to hum and the fan to buzz loudly. Every one was attention. Every eye was riveted in the long shaft of light that stretched forth into the night. A minute they waited, two minutes, five minutes! Nothing happened!

"Oh—this suspense is terrible," groaned Nipper.

"You're right, it is," whispered Bruce.

Every scout felt the same way. Was it a failure? Was their idea only visionary, alter all? Oh, why didn't something happen to relieve the tension. Why didn't—

"Look! There's a moth," said some one.

"Where?" asked half a dozen breathlessly.

"Out there! Look! Can't you see him?" said others.

Sure enough, coming down the long pathway of light was a solitary moth winging its fitful way toward the lamp. Now it was in the light and now it dodged out into the darkness. But always it returned a few feet nearer to the waiting scouts. It seemed irresistibly drawn toward the auto lamp.