The pairs of fire-balls moved slightly, then one went out as the other moved, and then they both showed up again.

Stealthily, very slowly, Frank reached for his rifle, his eyes on the balls of fire.

He got the rifle steadily to his shoulder, took careful aim, and pulled the trigger.

Crack!

Instantly the balls of fire disappeared—and the other two boys awoke!

CHAPTER VII
SOMEONE ELSE IN THE CABIN

“What was it?” asked Buster Billings, involuntarily reaching for his rifle.

“Grab the flashlight, Lanky! You fellows get your guns,” commanded Frank instantly, as he leaped from his folds of blanket. “We’ll see what that was!”

In a trice all four of the boys were making their way toward the spot where Lanky and Frank had seen the pair of fiery balls.

“There are the tracks,” ejaculated Lanky Wallace, as he pointed to the snow, where they could see the tracks of an animal very plainly.