"I don't know, I'm sure."
"Perhaps they'll land somewhere. If they do, we can play a trick on 'em, Nat."
"How?"
"By taking their rowboat when they are out of sight. We can easily tie the boat on behind and tow it to the boathouse. Then those fellows would have to walk back to Oak Hall."
"Good! That would be great!" ejaculated Nat Poole. "I wish they would land and leave the boat to itself for a while."
"Let us watch 'em," suggested Merwell, and to this his crony readily agreed.
It did not take Dave and his friends long to reach Bush Island. Beaching the rowboat, they went ashore and took a walk around.
"It certainly is a nice spot for a picnic," was Phil's comment. "I don't wonder that the town folks come here—and the Sunday schools. I'd like to have a picnic myself here—when it gets a little warmer."
"We might come over some holiday—and bring a basket of grub along," said Plum.
"Oh, we'd have to have something good to eat," put in Dave. "That's three-quarters of the fun."
Much to their surprise, in walking to the center of the island, they ran into Doctor Clay and Mr. Dale. Both had some bits of rocks in their hands
