"It must have drifted away," said Rand.

"Sure of that?" asked Jack.

"I knew it!" suddenly broke in Pepper.

"Then why didn't you tell us," demanded Rand. "What did you know?"

"Monkey Rae," replied Pepper.

"Well, what about him?" cried Jack.

"He has taken the boat," answered Pepper.

"How do you know?" questioned Donald.

"There is his track on the sand."

"He is certainly very much in evidence," said the colonel.

"I wish I could get hold of him once," cried Rand vindictively.

"I'd much prefer to get hold of the boat just now," put in Donald.

"There is certainly something queer going on here," observed Jack.

"More mysteries, Jack?" asked Rand.

"Yes," answered Jack. "That man is mixed up in this, too."

"What man?" asked Rand.

"The man with the limp," replied Jack.

"Where is he?"

"He was here, and I believe he went off in the boat," went on Jack. "You can see his tracks around here."

"Jack is right," confirmed the colonel, "the man has undoubtedly gone off with the boat."

"Hem," said Pepper, "there doesn't seem to be anything safe here.

"What are we going to do now?" asked Rand.

"Walk home, I guess," said Donald. "I don't know how else we will get there."

"There they go now!" cried Jack, suddenly pointing to their boat near the other side of the river. "Oh, if we only had a boat to follow them in."

"I have one," said the colonel. "We can take that. Come on, boys!"

Starting off at a pace that kept the four youths on a run to keep up with him, the colonel led the way back to the house. Just before coming to it he stopped.

"Take that path to the left, it leads down to the landing," he directed. "Get the boat you will find there ready, and I will be with you in a minute."

"Are you going with us?" asked Rand.

"Do you think I am going to be left out of this?" returned the colonel. "Not for a minute!"

Following the colonel's directions, the boys went down to the landing where they found the Scout, a 25-foot cat-boat, moored. Jumping on board they made ready to cast her loose, took the stops off the sail and had it partly hoisted when the colonel came along bringing with him a gun.

"Are you going to shoot them?" asked Pepper.

"I hope not," replied the colonel, "but it is just as well to be prepared for all emergencies. You are first-rate sailors," he added, stepping on board. "Cast her off and up with the sail."

"How is that?" called Rand.

"A little more on the peak; that's it, now pull it home and make fast."

During this time the boat had drifted away from the landing and now, as the wind filled the sail she glided out into the river, running free.

"See anything of them?" asked the colonel.

"Not yet," answered Rand, who was in the bow looking up the river.

"'Tis my opinion," said Donald, "that we'll be no likely to find them." "There they are!" cried Jack.

"Where away?" asked the colonel.

"Over there by the other shore," replied Jack. "You can just see them."

"They have such a long start," doubted Rand, "that we will never catch them."

"You can't most always tell until you try," observed Jack.

"And sometimes not then," added Pepper.

With the wind on her quarter the Scout sped up the river on a course that would............