Matters were in too serious a position for the jest to be appreciated, and Luella continued:

“It can't be the way out. Isn't there another?”

“We might try the passage.”

She gave a shudder and shrank toward me.

“No, no,” she cried in a low voice. “Try the door again. Somebody must hear you, and it may be opened.”

I followed her suggestion with a rain of kicks, emphasized with a shout that made the echoes ring gloomily in the passage.

I heard in reply a sound of voices, and then an answering shout, and the steps of men running.

“Are you there, Mr. Wilton?” cried the voice of Corson through the door.

“Yes, all safe,” I answered.

“Well, just hold on a bit, and we'll—”