"And I suppose if we ever got out we would always be watched and suspected," suggested Alaric, who had listened to all this with almost as much dismay as though it were an actual sentence. "Well, I'll never be caught, that's all. I'll drift away in the dinghy first." In saying this the boy threatened to do the most desperate thing he could think of.

"I believe I'd go with you," said Bonny. "Now, though, I must go and get ready our private signal, for we are getting close to the most dangerous place."

CHAPTER XIV.

BONNY'S INVENTION, AND HOW IT WORKED.

Bonny walked aft, exchanged a few words with Captain Duff, and then disappeared in the cabin, where he remained for some minutes. When he again came on deck he bore a box in which was a lighted lamp provided with a bright reflector. Only one side of the box was open, and this space the lad carefully shielded with his hat. The sloop was just entering Colros Passage, between Vashar Island and the mainland, and was nearer the western shore than the other.

Holding his box as far down as he could reach over the landward side of the vessel, Bonny turned its opening toward the shore, and allowed the bright light to stream from it for a single second. Then by quickly reversing the box the light was made to disappear. A moment later it was shown again, this time with a piece of red glass held in front of the lamp. This red light, after appearing for a single second, was also made to vanish, and another quick flash of white light took its place. A minute or so later the whole operation was repeated, and the white, red, and white signal was again flashed to the wooded shore. At the fourth time of displaying the signal it was answered by two white flashes from the shore.

There was a moment of suspense, and then Bonny exclaimed, in a low tone, "Great Scott! They're after us!"

BONNY'S INVENTION STARTED ON ITS JOURNEY.