plowing away through the snow to search out the point where the wires
left the ground. They traced them through the scrub timber, and, almost
at once, came upon a strange frame-like structure, ending in a tall pole,
and having at its center a house built of logs. The whole affair was
quite invisible outside the timber.

"It's his wireless station," breathed the Major. "No further doubt
remains."

He stepped to the door and found himself gazing into a well-arranged
room--electric generator, storage batteries in rows and instruments of
every description along the walls and the floor.

But what caught Bruce's eye was two rows of ten-gallon cans piled in the
rear. With a cry of joy he sprang toward them. But his joyful look
changed to an anxious one, as he lifted can after can and found it empty.
Only one contained gasoline, and that was but half-full.

"Not enough to give our Thunder-bird a drink," he groaned disgustedly.

"Well, at any rate," said the Major, "we've found a place that won't
make a bad shelter from Arctic blizzards. I suggest that we bring the
plane up to the edge of the woods nearest this point and camp here."

"What's that?" exclaimed Bruce in a startled whisper, as he detected some
noise outside.

He pushed the door open fearlessly, then laughed. There stood a dog.

"Not a bad find," said the Major. "He may be a lot of help to us. And,