"That's just the reason I want it," said Clif. "That shell is more important than you might think. I'll——"
But here occurred an interruption that opened up more startling possibilities, and drove the unexploded shell from the attention of all.
It was in the shape of an exclamation of surprise and alarm from one of the men who had gone a few steps in advance of the others, and had reached the boat's hiding-place as Clif spoke.
It arrested Clif's attention at once.
"What's the matter?" he called, sharply.
"The boat, sir," cried the marine, appearing from behind the bushes.
"What of it?"
"It's gone!"
"Gone?"
"Yes, sir."