I shall never forget that night. When we stepped to the pavement the whole world was shrouded. The heavy fog clung like depression; life was gone out—a foreboding of gloom and disaster. It was cold, dank, miserable; one shuddered instinctively and battered against the wall with steaming columns of breath. Just outside the door we were detained.

“Dr. Hansen?”

Someone stepped beside us.

“Dr. Hansen?”

“Yes, sir.”

“A message, sir.”

The doctor made a gesture of impatience.

“Bother!” he spoke. “Bother! A message. Nothing in the world would stop me! I cannot leave.”

Nevertheless he stepped back into the light.

“Just a minute, gentlemen.”

He tore open the envelope. Then he looked up at the messenger and then at us. His face was startled—almost frightened.

“Gentlemen,” he said, “I am sorry. Not a thing in the world would detain me but this. I would go with you, but I may not. My duty as a physician. I had hopes.” He came over to me and spoke softly. “I am going to send you one of the greatest specialists in the city in my stead. This young man should have attention. Have you the address?”

“288 Chatterton Place,” I answered.

“Very well. I am sorry, very much disappointed. However, it is my daughter, and I cannot do otherwise. Continue the brandy for a while—and this.” He slipped an envelope into my hand. “By that time Dr. Higgins will be with you.”

“You think there is hope?” I asked.

“There's always hope,” replied the doctor.

I returned to my companions. They were walking slowly. It was work for poor Watson. He dragged on, leaning on Hobart's arm. But at last he gave up.

“No,” he said, “I can't make it. I'm too far gone. I had thought—Oh, what a lapse it has been! I am eighty years of age; one year ago I was a boy. If only I had some more brandy. I have some at the house. We must make that. I must show you; there I can give you the details.”

“Hail a cab,” I said. “Here's one now.”

A few minutes later we were before the House of the Blind Spot. It was a two storey drab affair, much like a thousand others, old-fashioned, and might have been built in the early nineties. It had been outside of the fire limits of 1906, and so had survived the great disaster. Chatterton Place is really a short street running lengthwise along the summit of the hill. A flight of stone steps descended to the pavement.

Watson straightened up with an effort.

“This is the house,” he spoke. “I came here a year ago. I go away tonight. I had hoped to find it. I promised Bertha. I came alone. I had reasons to believe I had solved it. I found the Rhamda and the Nervina. I had iron will and courage—also strength. The Rhamda was never able to control me. My life is gone but not my will. Now I have left him another. Do not surrender, Harry. It is a gruesome task; but hold on to the end. Help me up the steps. There now. Just wait a minute till I fetch a stimulant.”

He did not ring for a servant. That I noticed. Instead he groped about for a key, unlocked the door and stumbled into a room. He fumbled for a minute among some glasses.

“Will you switch on a light?” he asked.

Hobart struck a match; when he found it he pressed the switch.

The room in which we were standing was a large one, fairly well furnished, and lined on two sides with bookshelves; in the centre was an oak table cluttered with papers, a couple of chairs, and on one of them, a heavy pipe, which, somehow, I did not think of as Watson's. He noticed my look.

“Jerome's,” he explained. “We live here—Jerome, the detective, and myself. He has been here since the day of the doctor's disappearance. I came here a year ago. He is in Nevada at present. That leaves me alone. You will notice the books, mostly occult: partly mine, partly the detective's. We have gone at it systematically from the beginning. We have learned almost everything but what would help us. Mostly sophistry—and guesswork. Beats all how much ink has been wasted to say nothing. We were after the Blind Spot.”

“But what is it? Is it in this house?”

“I can answer one part of your question,” he answered, “but not the other. It is here somewhere, in some place. Jerome is positive of that. You remember the old lady? The one who died? Her actions were rather positive even if feeble. She led Jerome to this next room.” He turned and pointed; the door was open. I could see a sofa and a few chairs; that was all.

“It was in here. The bell. Jerome never gets tired of telling. A church bell. In the centre of the room. At first I didn't believe; but now I accept it all. I know, but what I know is by intuition.”

“Sort of sixth sense?'

“Yes. Or foresight.”

“You never saw this bell nor found it? Never were able to arrive at an explanation?”

“No.”

“How about the Rhamda? The Nervina? Do they come to this house?”

“Not often.”

“How do they come in? Through the window?”

He smiled rather sadly. “I don't know. At least they come. You shall see them yourself. The Rhamda still has something to do with Dr. Holcomb. Somehow his very concern tells me the doctor is safe. Undoubtedly the professor made a great discovery. But he was not alone. He had a co-worker—the Rhamda. For reasons of his own the Rhamda wishes to control the Blind Spot.”

“Then the professor is in this Blind Spot?”

“We think so. At least it is our conjecture. We do not know.”

“Then you don't think it trickery?”

“No, hardly. Harry, you know better than that. Can you imagine the great doctor the dupe of a mere trickster? The professor was a man of great science and was blessed with an almighty sound head. But he had one weakness.”

Hobart spoke up.

“What is it, Chick? I think I know what you mean. The old boy was honest?”

“Exactly. He had been a scholar all his life. He taught ethics. He believed in right. He practised his creed. When he came to the crucial experiment he found himself dealing with a rogue. The Rhamda helped him just so far; but once he had the professor in his power it was not his purpose to release him until he was secure of the Blind Spot.”

“I see,” I spoke. “The man is a villain. I think we can handle him.”

But Watson shook his head.

“That's just it, Harry! The man! If he were a man I could have handled him in short order. That's what I thought at first. Don't make any mistake. Don't try violence. That's the whole crux of the difficulty. If he were only a man! Unfortunately, he is not.”

“Not a man!” I exclaimed. “What do you mean? Then, what is he?”

“He is a phantom.”

I glanced at Hobart and caught his eye. Hobart believed him! The poor pallid face of Watson, the athlete; there was nothing left to him but his soul! I shall not forget Watson as he sat there, his lean, long fingers grasping the brandy glass, his eyes burning and his life holding back from the pit through sheer will and courage. Would I come to this? Would I have the strength to measure up to his standard?

Hobart broke the tension.

“Chick's right. There is something in it, Harry. Not all the secrets of the universe have been unlocked by any means. Now, Chick, about details. Have you any data—any notes?”

Watson rose. I could see he was grateful.

“You believe me, don't you, Hobart? It is good. I had hoped to find someone, and I found you two. Harry, remember what I have told you. Hold the ring. You take my place. Whatever happens, stick out to the end. You have Hobart here to help you. Now just a minute. The library is here; you can look over my books. I shall return in a moment.”

He stepped out into the hall; we could hear his weary feet dragging down the hallway—a hollow sound and a bit uncanny. Somehow my mind rambled back to that account I had read in the newspaper—Jerome's story—“Like weary bones dragging slippers.” And the old lady. Who was she? Why was everyone in this house pulled down to exhaustion—the words of the old lady, I could almost hear them; the dank air murmuring their recollection. “Now there are two. Now there are two!”

“What's the matter, Harry?”

Perhaps I was frightened. I do not know. I looked around. The sound of Watson's footsteps had died away; there was a light in the back of the building coming toward us.

“Nothing! Only—damn this place, Hobart. Don't you notice it? It's enough to eat your heart out.”

“Rather interesting,” said Hobart. It was too interesting for me. I stepped over to the shelves and looked at the titles. Sanskrit and Greek; German and French—the Vedas, Sir Oliver Lodge, Besant, Spinoza, a conglomeration of all ages and tongues; a range of metaphysics that was as wide as Babel, and about as enlightening. As Babel? Over my shoulders came the strangest sound of all, weak, piping, tremulous, fearful—“Now there are two. Now there are two.” My heart gave a fearful leap. “Soon there will be three! Soon—”

I turned suddenly about. I had a fearful thought. I looked at Hobart. A strange, insidious fear clutched at me. Was the thought intrinsic? If not, where had it come from? Three? I strained my ears to hear Watson's footsteps. He was in the back part of the building. I must have some air.

“I'm going to open the door, Hobart,” I spoke. “The front door, and look out into the street.”

“Don't blame you much. Feel a bit that way myself. About time for Dr. Higgins. Here comes Chick again. Take a look outside and see if the doc is coming.”

I opened the door and looked out into the dripping fog bank. What a pair of fools we were! We both knew it, and we were both seeking an excuse. In the next room through the curtains I could see the weak form of Watson; he was bearing a light.

Suddenly the light went out.

I was at high tension; the mere fact of the light was nothing, but it meant a world at that moment—a strange sound—a struggle—then the words of Watson—Chick Watson's:

“Harry! Harry! Hobart! Harry! Come here! It's the Blind Spot!”

It was in the next room. The despair of that call is unforgettable, like that of one suddenly falling into space. Then the light dropped to the floor. I could see the outlines of his figure and a weird, single string of incandescence. Hobart turned and I leaped. It was a blur, the form of a man melting into nothing. I sprang into the room, tearing down the curtains. Hobart was on top of me. But we were too late. I could feel the vibrancy of something uncanny as I rushed across the space intervening. Through my mind darted the thrill of terror. It had come suddenly, and in climax. It was over before it had commenced. The light had gone out. Only by the gleam from the other room could we make out each others' faces. The air was vibrant, magnetic. There was no Watson. But we could hear his voice. Dim and fearful, coming down the corridors of time.

“Hold that ring, Harry! Hold that ring!” Then the faint despair out of the weary distance, faint, but a whole volume:

“The Blind Spot!”

It was over as quickly as that. The whole thing climaxed into an instant. It is difficult to describe. One cannot always analyse sensations. Mine, I am afraid, were muddled. A thousand insistent thoughts clashed through my brain. Horror, wonder, doubt! I have only one persistent and predominating recollection. The old lady! I could almost feel her coming out of the shadows. There was sadness and pity; out of the stillness and the corners. What had been the dirge of her sorrow?

“NOW THERE ARE THREE!”