"Why?" asked Captain Glenn.
"Because he will figure that is what we expect him to do. No, I believe we will be secure enough here to-night."
"That's pretty good reasoning, Jack," said Frank. "But we'll be ready for the pirates when they do come."
"Nevertheless, it would be well to sleep with one eye open, so to speak," said Williams.
"Oh, we'll stand guard," said Jack. "We will not lay ourselves open to surprise by all going to bed at the same time. To my mind the night should be divided into three watches, as should the day. There are six of us. That means four hours' guard duty apiece."
"That's reasonable enough," Frank agreed. "I'll take the first watch, if it's agreeable."
"Any way suits me," declared Captain Glenn.
"Then I'll pick you for second watch, Captain," said Jack. "I'll take the third. That will leave the day watch for Williams, Allen and Timothy."
Thus it was arranged. Frank began his watch at six o'clock that evening.
It was about an hour later when, as the others had gathered about them,
Frank conceived a brilliant idea.