“I wish this boat would stay still, Tess,” she complained. “Let’s go back to the land. I feel all joggled up inside me.”

Tess jumped up. “Why-ee!” she gasped. “Where—where is Palm Island?”

“Where is what?” her sister demanded, likewise scrambling to her feet.

They were both facing seaward. There were islands in that direction, but smaller ones, and, it seemed to Tess and Dot, a vast distance away! Tess whirled around. Palm Island was behind them. The motor-boat was blundering away from their refuge and their sisters and their friends!

If Dot and Tess had been looking for adventure, they certainly had found it this time.

“Is that Plam Island?” Dot demanded.

“Of course it is.”

“But—but what’s it doing ‘way over there?” quavered Dot. “I thought we were tied to it.”

“We came untied I guess,” said Tess, despondently, seeing the rope dragging over the boat’s rail. “Oh, dear me!”

“I told you I didn’t like this place, Tess Kenway!” stormed Dot. “And now see what’s happened to us. Ruthie will be awful mad.”