"All right, I'll be right out now."

Again there was silence.

A revolver butt tapped the side of the house.

"Come on out of there," said the Austrian outside.

"Coming," replied Hal.

Again silence; but this time broken from an unexpected source.

There came a sudden cry from the man on the floor—the man whom Colonel
Anderson had struck down as he jumped into the room:

"Help!"

Just that one word; that was all. Again a revolver butt crashed upon the
Austrian's head and he subsided without a murmur.

But the one word had given the warning.