How to do this was a puzzle. After studying the problem for a while, Phil directed Ed and Irv on board the flatboat, and Will and Constant in the skiff, to relax the tension on the great square of sailcloth.

“I’m going down on top of it,” he said, “to push the barrels off.”

“But when you do that, it’ll close up to the bottom of the boat and catch you in it,” said Will. “Don’t think of doing that!”

“I must,” said Phil, “we’re sinking; it’s our only chance, and I must take the risk. Let me have your big knife, Constant.”

“What are you going to do with it?” asked the boy, as he handed it to Phil.

“Cut my way out if I can, or perhaps cut a way out for the flour barrels. Good-by, boys, if I never get back. And thank you for everything.”

With that he stepped upon the tarpaulin and slid down it under the boat. Presently he came back, gasping and struggling.

“I got one barrel out,” he said. Then he waited awhile for breath, and went under again. This time he was gone so long that his comrades feared the worst, with almost no hope for a better result. But they could do nothing. Presently Phil came up, but so exhausted that he could only cling in a feeble way to the edge of the canvas. The boys dragged him into the skiff, and he lay upon its bottom for a time like one almost drowned, which indeed he was. When he had somewhat recovered, Irv called to him:—

“I’m going down next time, Phil. You shan’t brag that you’re a better water-rat than I am.”