"Yes, we can do that," answered Mr. Rover. "But it will be a rough journey."

"I have a better idea," came from Dick. "Father has his spyglass with him. Why not ascend that hill back of where the treasure cave is and then get up in the highest tree there? A fellow ought to be able to see all around from that height."

"Hurrah! just the thing!" exclaimed Sam. He did not relish the long tramp through the thorn bushes and tangle of vines.

Dick's idea was acceptable to all, and they set off without further delay. They took the path leading to the shattered cave, and then mounted the small hill Dick had mentioned. Close to the top stood a large tree.

"Let me go up!" exclaimed Tom, who could climb like a cat, and he started without delay.

"Look out that you don't break your neck!" cried his parent.

"I'll be careful," answered the fun-loving youth. "This just suits me!" he added, enthusiastically.

"Can't I go, too?" asked Sam.

"If you are careful," answered Mr. Rover, and up went the lad, right on the heels of his brother. It was rather difficult work getting from limb to limb, for some were wide apart, but the vines, which used the tree as a trellis, aided them greatly. Soon Tom was close to the top and Sam speedily joined him. Then each took his turn at looking through the spyglass.

"I see the Rainbow!" cried Tom. "She is headed for the north side of the isle."