ndy. "I know it is day, because
I'm hungry."

CHAPTER IV

A SENSATIONAL DISCOVERY

When Will awoke he began preparations for breakfast before paying any
attention whatever to his chums, whom he believed to be sleeping quietly
on their cots. It was November, and quite chilly in the apartment, so
his next efforts were directed to coaxing the electric coils into a
cheery glow.

Presently George came tumbling out in his pyjamas and sat down on a
rickety chair to talk of the adventures in prospect.

"I wonder if the Labyrinth mine is so much of a labyrinth after all?" he
asked. "It seems to me that we might find our way through it without
danger of losing ourselves," he continued with a yawn.

"It's some labyrinth, I take it," Will replied.

"Well, we can make chalk marks on the walls as we move along," suggested
George. "Besides," he added, "we can string an electric wire through the
center gangway and turn on the lights."

"There are probably electric lights there now," answered Will.

"Then there's no danger of our becoming lost," George argued.

"I wish you'd go to the back of the room and tip over those two cots,"
grinned Will. "It's the hardest kind of work to get Tommy and Sandy to
bed, but when you do get them in bed once, it's harder still to get them
out of it. Just tip the cots over and roll 'em out on the floor."

George approached the two cots in a stealthy manner and made ready to
give Tommy and Sandy the bump of their lives.

"Don't break their necks!" advised Will.

As soon as George reached Tommy's bunk he stretched forth a hand for the
purpose of tangling the boy up in the bedclothing so that his fall to
the hard floor might be in a measure broken.

As he swung his hand over the cot, however, his eyes widened and he
called out to Will that the boys were not in their cots.

There was a look of alarm as well as of annoyance on each face as the
lads thought over the situation.

"The little idiots!" exclaimed Will.

"That isn't strong enough!" George corrected.

"There's no knowing how long they've been gone," Will suggested. "The
chances are that they went away as soon as we went to sleep."

"In that case, they're in trouble!" George declared.

"In what kind of trouble?"

"The good Lord only knows!" replied George. "Tommy and Sandy can get
into more different kinds of trouble in less time than any other boys on
the face of the earth. They're the original lookers for trouble!"