poor Tom. He gazed in all directions for Sam, and for th$ shark, but neither one nor the other was to be seen.
"He must have caught Sam under the water!" he muttered. "Oh, Sam, what an awful death to die!"
A slight noise at the upper end of the raft disturbed him. He turned swiftly, to see a wet hand glide over the woodwork. He made a leap and clutched the hand, and then Sam's head appeared. He gave a frantic yank, and both lay on the flooring of the raft. Sam was saved.
"The shark!" gasped Tom, when he could speak. "Did it it bite you?"
"No, but it grazed my shoulder," answered Sam. "If I had not dived down, I would have lost an arm at the very least."
When they felt able they looked around, but the shark had disappeared.
"That settles it," said Tom. "We must be careful and keep out of this water in the future. If we want to bathe, we will have to build a pool."
During the remainder of the trip to the wreck both were careful not to run the slightest chance of falling overboard.
"Not such a very lovely place to live in, after
