"I agree with you," Laverick answered, "but, on the other hand, you must remember that these gentlemen have had no choice. I stepped from my office direct into the taxi, and I proposed to drive straight from here to the place where I shall probably leave the other document I am carrying with me. Why I have taken you into my confidence is to ask you this. Can you walk with me to the corner of the street, or until we meet a taxicab? it sounds cowardly, but, as a matter of fact, I am not afraid. I simply want to make sure of delivering this document to the person to whom it belongs."
The constable stood still, a little perplexed.
"My beat, sir," he said, "only goes about twenty-five yards further on. I will walk to the corner of Holborn with you, if you desire it. At the same time, I may say that I am breaking regulations. How do I know that it is not your scheme to get me away from this neighborhood for some purpose of your own?"
"You don't believe anything of the sort," Laverick declared, with a smile.
"I do not, sir," the policeman admitted. "Keep by my side, and I think that nothing will happen to you before we reach Holborn."
Laverick was a man of more than medium height, but by the side of the policeman he seemed short. Both scanned the faces of the passers-by closely--the police-man with mild interest, Laverick with almost feverish anxiety. It was a gray afternoon, pleasant but close. There seemed to be nothing whatever to account for the feeling of nervousness which had suddenly come over Laverick. He felt himself in danger--he had no idea how, or in what way--but the conviction was there. He took every step fully alert, absolutely on his guard.
They were almost within sight of Holborn when a cry from the bystanders caused them to look away into the middle of the road. Laverick only cast one glance there and abandoned every instinct of curiosity, thinking once more only of himself and his own position. With the constable, however, it was naturally different. He saw something which called at once for his intervention, and he immediately forgot the somewhat singular task upon which he was engaged. A man had fallen in the middle of the street, either knocked down by the shaft of a passing vehicle or in some sort of fit. There was a tangle of rearing horses, an omnibus was making desperate efforts to avoid the prostrate body. The constable sprang to the rescue. Laverick, instantly suspicious and realizing that there was no one in front of him, turned swiftly around. He was just in time to receive upon his left arm the blow which had been meant for the back of his head. He was confronted by a man dressed exactly as he himself was, in morning coat and silk hat, a man with long, lean face and legal appearance, such a person as would have passed anywhere without attracting a moment's suspicion. Yet, in the space of a few seconds he had whipped out from one pocket, with the skill almost of a juggler, a vicious-looking life-preserver, and from the other a pocket-handkerchief soaked with chloroform. Laverick, quick and resourceful, feeling his left arm sink helpless, struck at the man with his right and sent him staggering against the wall. The handkerchief, with its load of sickening odor, fell to the pavement. The man was obviously worsted. Laverick sprang at him. They were almost unobserved, for the crowd was all intent upon the accident in the roadway. With wonderful skill, his assailant eluded his attempt to close, and tore at his coat. Laverick struck at him again but met only the air. The man's fingers now were upon his pocket, but this time Laverick made no mistake. He struck downward so hard that with a fierce cry of pain the man relaxed his hold. Before he could recover, Laverick had struck him again. He reeled into the crowd that was fast gathering around them, attracted by what seemed to be a fight between two men of unexceptionable appearance. But there was to be no more fight. Through the people, swift-footed, cunning, resourceful, his assailant seemed to find some hidden way. Laverick glared fiercely around him, but the man had gone. His left hand crept to his chest. The victory was with him; the document was still there.