The captain stirred uneasily in his sleep and Chris opened his eyes drowsily but soon fell off to sleep again.
"Come outside, Walt, where we can talk without the chance of being overheard," Charley whispered.
The two lads stole softly out of the wigwam and down to the water's edge where they sat down on the grassy bank.
"Now listen closely," Charley commanded.
CHAPTER XXIII.
MORE MYSTERY.
The two boys remained quiet for several minutes listening to the bell's deep toned tolling. At last Walter remarked, "It don't sound as though it was very far away from us, not over two miles, I should say."
"Good," exclaimed Charley with satisfaction, "I was about to ask you what you thought the distance was. Two miles is about what I had estimated. We can't say very exactly, for sound is likely to travel far in this still air. But let us make a liberal allowance for the stillness. I think we are safe in saying that the sound comes from a point not more than four miles distant from this island. Now, the next question is, from what direction does it come?"
"It's hard to tell exactly, the sound seems to fill the air so, but I should say that it came from the westward," said Walter after another moment of careful listening.