"Get out of here—whoever you are."

With a muttered ejaculation the intruder turned his head to look, then sprang back from the safe, breaking the contact. Instantly the room became black. David stared, still stupidly, at the dull red spot on the safe until it faded into blackness. Then he realized. He stood very still, muscles tense, senses sharply alert. He heard a faint rustling but he could not make out from what part of the room it came.

Smith crouched, rigid and breathless, waiting for a shot. It did not come. Slowly, as silently as possible, he reached for the sheath knife he carried and drew it. He had a gun, but a knife, the old cracksman had said, was much better for a fight in the dark and it had the superlative virtue of noiselessness. He became motionless again, his eyes vainly straining to pierce the darkness, waiting for the other to make a move. The silence and inaction became unbearable. He gathered his nerve and muscles for a rush to where the door ought to be and leaped forward. At the third step a fist struck out and caught him on the neck. He recoiled a little, then lashed out blindly with the knife. He heard a sharp gasp and a body crumpling to the floor. But Smith waited no longer. Groping his way to the door, he sped along the corridor and through the shop to the rear window where he had entered.

A quarter of an hour later a watchman espied the open window. He whistled a policeman to his aid and together, after a period of timorous deliberation, they entered and with many discreet pauses tiptoed over the building. They found David in the corridor, where he had given up crawling, weakly trying to stanch the flowing blood.

The policeman was young and new to his job. He mopped his brow nervously at sight of so much blood.

"Are yez much hurted, d'yez think?" he inquired anxiously.

"More scared than hurt, probably." David smiled wanly. "But, just the same, I think you'd better call up a doctor."

CHAPTER XII

WHICH HOUSE?

The doctor did not share David's opinion. He shook his head gravely, looked important and said, "It's lucky I got here so soon." Then he brightened a little. "But it's a lovely clean cut and we'll do what we can."