“The wind is shifting for one thing,” observed Dick, “which may bring about a change in the weather before very long.”
“Listen, what do you suppose that sound can be? If the weather were not so cold, and the season summer instead of early winter, I would surely say it was distant thunder!”
All three stood still to listen intently. Presently the far-away rumbling sound was again borne to their ears; and, just as Roger had declared, it was like distant thunder coming from beyond the range of forest-clad hills.
It was not strange that the two boys and the frontiersman turned uneasy looks upon each other, surrounded as they were by such strange freaks of nature.
CHAPTER IX
SURROUNDED BY MYSTERIES
“What about the swivel gun in the camp; could it be heard as far away as this, do you think, Dick?” asked Roger, as though a new idea had flashed into his mind.
The other shook his head in the negative.
“Hardly,” he replied, “and, even if it were possible, you forget that it is only when the wind picks up from this new quarter that we hear the sound.”