"They didn't find it. It's in the spring back there," answered Sam. "I looked."

The luncheon was prepared in a hurry and the boys ate ravenously. The excitement of the morning had not interfered with their appet.i.tes.

"Now, Billy, if you see anything, blow your motor horn and keep it going until we hear it. Some of us will hear you. I propose that we spread out so as to cover the island, but still keeping within yelling distance of each other. We know now that the girls are on this island."

"Well find them." Billy walked slowly down to his launch, got in, and reversing the engine, backed out, waving an indolent hand at his companions.

Suddenly a weird scream rang out on the still air.

"Run for it, boys. That way," cried George, pointing excitedly.

"No! It's the other way," shouted Sam.

"You're both wrong. It's toward the other side of the island," declared Larry.

"Now look here, fellows. We are all of us wrong. If we are going to accomplish anything we must stop fooling and go at this business scientifically. I will take this side of the island. Sam, you and two of the fellows take the middle, and Larry the other side, keeping within sight of the sh.o.r.e. We will search every inch of it, though I don't believe we can finish the job before night."

"We had better take our lanterns with us, or we shall break our precious necks," suggested Sam.

"Yes. We will do that. Larry, when you catch sight of Billy on the other side, beckon him in and tell him we may not be back until late this evening, and for him to keep circling the island until he finds us back in camp again. Better take some grub along. We can stand it to eat a cold supper for once. We will have a warm one when we get back."

After having made their preparations the boys started out, all the others waiting until Larry got a good start, Sam's party starting next, George Baker leaving the camp last. In that way they planned to keep pretty nearly abreast.

About this time Crazy Jane McCarthy, face flushed, hair down, her skirt torn in several places, might have been seen fleeing along the sh.o.r.e of the island, running away from the Tramp Club's camp and toward their own secret nook, where the "Red Rover" was lying calmly at anchor in the half cave that had furnished a hiding place for the girls before.

She came tearing through the bushes nearly falling into the lower end of the stream.

"They're coming!" she shouted. "Get to cover!"

"Sh-h-h!" warned Hazel, who sat awaiting Jane, in the rowboat. "I hear a motor boat outside. I think it is the boys' boat."

"I tell you they are on their way to search the island," answered Jane.

"All of them?"

"All but Billy Gordon. He has gone off in the launch to keep an eye on the sh.o.r.e."

"Then that is his boat out there. Get in here. I am worried that Harriet is still out."

Just then a soft "hoo-e-e-e" from the bushes on the opposite side of the stream, told them that Harriet Burrell had returned. She had been out on a scouting expedition. Hazel rowed over to the other side of the creek.

Harriet jumped aboard. Jane, in excited whispers, told her that the boys were coming and that Billy was out in the launch.

"I know. I saw him just a few moments ago. What are their plans?"

Crazy Jane explained what she had been able to hear when she was observing the Tramp Club's camp. She had seen Larry pick up Harriet's handkerchief, though she was not aware that it was Harriet's.

"That is where I lost it, is it?" laughed Harriet. "It is all right.

That will encourage them. If they go on beyond here they will find other evidences that will lead them still further on. You see I wanted to get them as far away from home as possible so as to keep them out after dark."

Hazel manipulated the rowboat until they were in the deep shadows of the rocks, after which they climbed aboard the "Red Rover." Harriet explained her plans to her companions and directed them to keep as quiet as possible in case any of the searchers should come that way. The girls had pulled the houseboat into the secret retreat on the previous night.

They had kept a watchful eye on the boys all the morning, to see what they were planning to do, and Jane had given the lads the creeps by uttering wild, weird cries in the depths of the forest.

Harriet and Jane cooked themselves something to eat. They had been out for a long time and were hungry. Their companions and guardian were sitting about chatting with them. Miss Elting was of the opinion that they were much better off in their hiding place than at an anchorage out in the lake, always provided that their enemy did not find them out.

Harriet agreed with her, but thought they would be in a serious situation if their unknown enemy were to find them. He had shown evidences of keenness that made the finding of the "Red Rover" appear to be a simple task for him. That he would annoy them further, the girls were positive; that he already had located them was more than possible.

Splash!

Their conversation was suddenly checked. A stone had dropped but a few feet from the rear end of the "Red Rover," falling into the creek.

Harriet laid a finger on her lips. Tommy had started to speak, but checked herself in time. Harriet and Jane crept to the door of the houseboat and peered out. As they did so a second splash startled them.

This time they saw the stone. It was a good-sized rock. It fell some feet below the rear end of the "Red Rover." Some one was sounding the thick growth there. Who it was, they discovered a moment later.

"There's water down there, but it's shallow. I can tell by the splash,"

announced a voice above them.

"It's George," whispered Jane.

"I'll take a look along the sh.o.r.e on my way back. There may be an inlet that we haven't seen," continued George Baker, talking to himself.

Jane gripped an arm of her companion.

"If he does, we shall be discovered," she whispered.

"Never mind. We will have scared them off long before then. He will strike the trail I left for them, before long, if he keeps straight on.

That will mean that he will go right on and that he will call to the others to join him when it begins to get dark. You know the island begins to narrow a short distance beyond here. Won't it be funny to see them following that trail? And what a surprise they will get before they have finished with this day's work." Harriet chuckled. She had been whispering. She paused suddenly as a pebble rattled down within a foot of the stern of the "Red Rover."

"They're getting rather close," whispered Jane.

"Captain Baker kicked that pebble down. He is going away. Do you hear him?" George was whistling to himself as he tramped away toward the other end of the island. They heard him call to his companions shortly after that and shout some directions to them. Then nothing more was heard from the boys for the rest of the afternoon.

The girls discussed the situation with Miss Elting. The guardian decided that all the girls save one should remain on board the scow. One, she agreed, might go out to reconnoitre. If the boys returned before dark it would be well to know about it. Their further plans depended upon the immediate actions of the Tramp Club. Harriet was the one who was chosen to keep watch of their rivals.

She began at once to make her preparations, tying her hair in a tight knot on top of her head and drawing a waterproof bathing cap over all.

"I am going to protect my hair," she smiled in answer to the unspoken question in the eyes of her companion. "Those bushes pull out a few strands every time I go scouting among them. I'll imitate the sound that a crow makes if I see them coming back," she added. "No one must go out in the meantime. All we can do is to keep quiet and wait. We've already won the camera. We will have our fun when night comes, however, and if we don't give those boys the fright of their lives I shall be keenly disappointed."

"Which way shall you come back?" asked Jane.

"The way we came in. Don't have the boat wait for me down there. If I have to come back in a hurry I will wade. Meadow-Brook Girls aren't afraid of the water, you know."

"We know," answered Miss Elting, smiling, "but be careful that you don't fall and hurt yourself. Good-bye. I will have the sheets and other things ready by the time you return. We have the poles here. I do hope we get an opportunity to use the stuff now that we have been at so much pains to get it ready. You see, I am just as anxious to play this trick as the rest of you girls."

Harriet laughed merrily at the prospect of the coming fun, then stepped out into the rowboat that Hazel had pulled close to the stern of the houseboat. A few moments later Hazel left her companion on the west bank at the lower end of the little stream. Harriet slipped away through the bushes almost noiselessly. If everything worked smoothly the Tramp Club were to receive an overwhelming surprise.