The alarm took us by surprise, for we had expected to get the start on our enemies by at least half an hour. That the officers of the law were at the door none of us doubted. We stood still where we were, and in a whisper the captain admonished us to be quiet. There was a brief silence, and then the rapping began again.

“What am I to do?” whispered Monsieur Ragoul, and so loudly that his wife promptly clapped a hand over his mouth.

“They have come to seize us,” said I, in a low voice. “I fear we are in a trap, with no choice but to yield or fight.”

“Resistance would be folly,” Captain Rudstone replied quickly, “and for Miss Hatherton’s sake we must not be taken. There is a chance for us yet—it is possible that the back way of the house has been left unguarded.”

“Then let us be off at once,” I urged, taking courage from his suggestions.

As I spoke, a lull came in the pounding, and a voice cried loudly, “Open! Open!”

Monsieur Ragoul was fairly beside himself with terror and the servants were as helpless as himself; so the captain and I had to act for ourselves, and that without the loss of another second. We found the side door, opened it, and closed it softly behind us when we stepped into the court. The pounding at the front of the house had started afresh, and there was a clamor off in the distance; but so far as we could see by the moonlight this rear avenue of escape was open.

The captain led the way forward, and I followed with Miss Hatherton at my side; her hand rested on my arm, and I could not detect the slightest tremor in her touch. We glided swiftly across the court, and entered a narrow passage leading to the street beyond. We were just at the end of it when a man appeared abruptly from one side and barred the way.

“Not so fast!” he exclaimed, with a movement to draw a weapon. “Stop, in the name of—”

The fellow got no further, for quickly the captain had him pinned by the throat. The two fell after a brief scuffle, and I heard somebody’s head give the stone an ugly rap. The captain jumped to his feet, but the other man lay motionless and quiet.