Now, have you any idea of the ident.i.ty of that man?"

"None whatsoever," I answered. "My mind is a perfect blank on everything, save the personal appearance of the man who was afterwards struck to the heart."

"Exactly. But don't you think that the man who expressed horror at the first crime fell the victim of the second?"

"Ah! I never thought of that!" I said. "Of course, it seems most likely."

"Certainly. The second crime was committed undoubtedly in order to conceal the first."

"Then how extraordinary it is that I was spared."

"There was a motive, I believe, for that. We shall no doubt find that later."

"You will communicate with Scotland Yard, I suppose," I remarked.

"Perhaps we shall; perhaps not," answered the inspector, vaguely. "The affair must, of course, be fully investigated. Have you anything to add? You say that some woman treated you kindly. Have you any idea of her personal appearance?"

"None," I answered. "The only fact I know was that she was in evening dress, and that upon her wrist was a curious smooth-worn bangle of a kind of fine plaited wire, very pliable, like those worn by African native women."

"Eh! What--impossible!" gasped the inspector, in a voice which surprised me. But next moment he recovered his self-possession and made a calm remark that this fact did not lead to anything definite. Yet the sudden exclamation of startled surprise which escaped him aroused within me a belief that my words had given him some mysterious clue.

"You have no further statement to make?"

"None," I responded.

There was a few moments' silence during which time the quill continued its rapid scratching.

"You will kindly sign your information," the officer said, whereupon the constable brought me the sheet of foolscap and a pen wherewith I scrawled my name.

"Good," observed the inspector, with a grunt of satisfaction. "And now I must ask you to excuse me further, Mr--Mr Heaton, and wish you good morning."

I made my adieu, after obtaining from him a promise to communicate with me if anything transpired, and, accompanied by the constable, made my way out into the long pa.s.sage again.

I had not walked a dozen paces ere I knew instinctively that some persons were near me, and next instant felt myself seized roughly by both arms and legs.

"What are you doing?" I shouted in alarm; "let me go!"

But only for an instant I struggled. The force used was utterly irresistible, and not a single word was uttered. My arms were in a moment pinioned, rendering me helpless as a child. With my terrible affliction upon me, I could neither defend myself nor could I see my a.s.sailants. Whoever the latter were, it was evident that they were determined, and, further, that I had been cleverly entrapped.

My first thought was that I had been arrested, but ere the lapse of a few moments the hideous truth became impressed forcibly upon me.

I tried to fight for life, but my wrists had been seized in grips of steel, and after a few desperate wrenches I stood, bound, and utterly unconscious of where I was.

My real position was, to a certain degree, plain. The man whom I had believed to be a constable was no police-officer at all, but some thief or London ruffian; I, far too confiding, had neglected to take the precaution of feeling his uniform.

A shrewd suspicion overcame me that this trap had been purposely laid for me. The man who had posed as a police inspector had obtained from me a signed declaration of the remarkable occurrence, for what reason I knew not. Did they now intend to silence me for ever? The thought struck a deep and terrible dread within my heart.

To my demands to know where I was, no response was given.

Indistinct whisperings sounded about me, and by the liquid "s's" of one person I felt convinced that a woman was present.

Little time, however, was I given in which to distinguish my surroundings, for two persons gripped my bound arms and drew me roughly through a narrow door, across an uneven floor, and thence down a long, crooked flight of stone steps.

From below came up a dank, mouldy smell, as of some chamber long unopened, and suddenly there broke upon my quick ears the wash of water.

In that moment of mental agony the truth was rendered plain. I was not in a police-station, as I believed, but in some house beside the Thames, and, moreover, I was descending to the water--going to my death.

Once again, as a last effort, I struggled and fought with the fierce desperation begotten of terror, but in a moment the strong hands that held me pushed me violently forward, and I then felt myself falling helplessly from some dizzy height. My head reeled, and weakened as I already was, all knowledge of things became blotted out.

The touch of a cool, sympathetic hand upon my brow was the first thing I subsequently remembered. My arms had apparently been freed, and with a quick movement I grasped the hand. It was a woman's.

Was I dreaming?

I stretched forth my left hand to obtain some idea of my surroundings, and found myself lying upon an uneven stone flooring that seemed covered with the evil-smelling slime of the river.

With my right hand I touched a woman's firm, well-moulded arm, and to my amazement my eager fingers came into contact with a bangle. I felt it.

The hand, the arm, the bangle, the perfume of _peau d'Espagne_, all were the same as those of the woman who had pitied me in my helplessness, and had so tenderly cared for me in that mysterious, unknown house, wherein the tragedy had afterwards occurred.

At first I lay speechless in wonderment, but when I found tongue I spoke, imploring her to make explanation. I heard her sigh deeply, but to all my inquiries she remained dumb.

CHAPTER FIVE.

THE UNSEEN.

"Tell me," I demanded in my helplessness, of the mysterious woman at my side, "what has happened?"

"Rise, and try whether you can walk," said the voice at last, sweet and low-pitched, the same well-remembered voice that had spoken to me in that unknown house of shadows.

I struggled and rose stiffly, a.s.sisted tenderly by her. To my joy I found that I could walk quite well.

"Thank G.o.d!" she gasped, as though a great weight had been lifted from her mind. "Thank G.o.d that I have found you. The tide is rising, and in half an hour you would have been beyond human aid."

"The tide!" I repeated. "What do you mean?"

"At high tide the river floods this place to the roof, therefore nothing could have saved you."

"What place is this?"

The voice was silent, as though hesitating to reveal to me the truth.

"A place wherein, alas! more than one person has found his grave," she explained at last.

"But I don't understand," I said eagerly. "All is so puzzling. I believed that I was inside a police-station, whereas I had actually walked into this mysterious and cleverly-prepared trap. Who are these people who are my enemies?--tell me."

"Unfortunately, I cannot."

"But you, yourself, are not one of them," I declared.