r and followed the rails when we came to the main gang
way, we would have been home and in bed by this time!"

"But we didn't," grinned Tommy. "We thought we had a cinch on getting
out by way of this cord and so we followed that. I don't see, though,"
he continued, "how we came back to this same old chamber by following
the cord. That looks queer to me!"

"I'll tell you how!" replied Sandy. "There's some gink been walking on
ahead of us stringing the cord out for us to follow!"

Tommy sat down on the bottom of the chamber and wrinkled his freckled
nose provokingly.

"We're a couple of easy marks!" he laughed.

"Easy marks is no name for it!"

"Well, what'll we do now to get out?" Tommy asked. "First thing we know,
it'll be daylight, and then Will and George'll be calling out the police
to find us. We ought to get home before they wake up."

"I'm willing!" declared Sandy. "I'd like to be in my little bed this
minute! I've had about enough of this foul air!"

The boys passed along until they came to the second trail sign and then
stopped. Tommy pointed down to it with a hand which was not quite steady
and looked up into his chum's face with frightened eyes.

"That's been moved!" he said.

"How do you know it's been moved?"

"Because you had the side stone on the other edge."

"I don't think I did!" argued Sandy.

The boys puzzled over the situation for a few moments, and then
proceeded down the chamber looking for the tramway rails.

They passed from chamber to chamber and finally came to a place where
the slope was upward.

"I guess we've struck it at last!" Sandy exclaimed.

"But there are no rails here!" Tommy argued.

"Then we're on the wrong track again," admitted Sandy.

He bent down to the rock with his searchlight and pointed out evidences
that the passage had once been laid with rails.

"When they strip a chamber or a counter gangway," he said, "they take
away the rails. It seems that we are now in a part of the Labyrinth mine
which has been worked out."

"I know what to do!" exclaimed Tommy. "I'll give the call of the Beaver
Patrol and tell those ginks who have been giving the call of the pack
that we're lost! That ought to bring them out of their holes."

The Beaver call was given time after time, but no reply came.

"Say," Tommy said after his patience had become exhausted, "I believe
it's daylight. Look at your watch. I left mine in the bed!"

"I left mine in bed, too," answered Sa