“He must have got off,” said Herbert. “George said he was building a raft.”
“Then I mistrust something’s happened to the poor boy,” said Bence gravely. “He couldn’t build a raft here that would hold together till he reached the mainland.”
Herbert turned pale.
“I hope it isn’t so bad as that,” he said. “Let us row back as quick as we can!”
CHAPTER XII
A MYSTERIOUS DISAPPEARANCE
As they were rowing back they scanned the sea in every direction, but nowhere did they discover any signs of Robert or his raft.
“Perhaps,” suggested Herbert, breaking a long silence, “Bob is already at home.”
He looked inquiringly in the face of his companion to see what he thought of the chances.