“Ask him that! We’ve got to bust through here—”

His compact body landed against the panel. It shook, but refused to yield.

“Come back here! Now, all together!” bellowed Monte.

The three leaped forward and struck the partition.

This time it swung inward, slowly and without a sound. The crooks leaped through the opening, and the “Kid” flashed his torch. They were standing just inside a vast, windowless room, at whose farther side they had a glimpse of sagging timbers and ruined walls. Nowhere was there a sign of the man who had eluded them.

“Get a move on!” Monte growled throatily. His lip drew up and he snarled at his companions. “A hell of a bunch of crooks, we are! Why didn’t you take a shot at him, when you saw he was going to make a getaway?”

The “Kid” glared back.

“Cut out that kind of talk, Chief! You got a gat, and two hands! He buffaloed you just like he did us! Be a sport and take your medicine!”

A determined search of the ruined chamber yielded no results. The “Kid” dropped to his stomach and wormed his way under the mass of timbers at the farther side. He found the beginning of a stone-lined tunnel, which dipped abruptly into the earth.

Damp, mouldy air fanned his cheeks; and as he crouched, motionless, listening, a distant reverberation came to him from the bowels of the earth. It sounded like the clanking of a great iron door.