All was still.

"Good God!" he added; "we must force the door."

"I hear a strange noise within," said the young man, who trembled violently.

"And so do I. What does it sound like?"

"I scarcely know; but it nearest resembles some animal eating, or sucking some liquid."

"What on earth can it be? Have you no weapon that will force the door? I shall go mad if I am kept here."

"I have," said the young man. "Wait here a moment."

He ran down the staircase, and presently returned with a small, but powerful, iron crow-bar.

"This will do," he said.

"It will, it will.—Give it to me."