"Oh! I hope so," breathed Paul, uneasily.
Under the hearty strokes of the two boys the boat quickly arrived close beside the object that had attracted their attention. It was undoubtedly a boat, and a green one at that. Frank stretched out his hand and took hold of it.
"Waterlogged," he said, as he drew himself along the sunken craft in order to reach the bow.
"Frank, it looks to me like your boat!" cried Paul, huskily.
"It is my boat; see here," and Frank, drawing the sunken craft up by main strength until a fair portion of its bow was exposed, pointed to a name painted there.
"It's the Undine, as sure as you live! What in the wide world can have happened to the girls?" muttered Paul, staring at that telltale name as though it might speak, and answer his question.
CHAPTER XXI
MAROONED ON THE ISLAND
"Let's drag this boat up on shore. I want to examine it!" said Frank, who was just as pale as his companion, for a dreadful fear seemed to be tugging at his heart.
"Perhaps they found it leaking, and had to wade ashore when it went down right here," suggested Paul, as he scanned the wooden bank.