"He'll be back any minute now," she replied, obviously relieved to see him laugh; "but the fact is, we didn't expect you so early--I mean, my husband hardly thought you would come at all."

"I am always delighted to come--when I am really wanted, and can be of help," he said quickly; "and, perhaps, it's all for the best that your husband is out, for now that we are alone you can tell me something about his difficulties. So far, you know, I have heard very little."

Her voice trembled as she thanked him, and when he came and took a chair close beside her she actually had difficulty in finding words with which to begin.

"In the first place," she began timidly, and then continuing with a nervous incoherent rush of words, "he will be simply delighted that you've really come, because he said you were the only person he would consent to see at all--the only doctor, I mean. But, of course, he doesn't know how frightened I am, or how much I have noticed. He pretends with me that it's just a nervous breakdown, and I'm sure he doesn't realize all the odd things I've noticed him doing. But the main thing, I suppose--"

"Yes, the main thing, Mrs. Pender," he said encouragingly, noticing her hesitation.

"--is that he thinks we are not alone in the house. That's the chief thing."

"Tell me more facts--just facts."

"It began last summer when I came back from Ireland; he had been here alone for six weeks, and I thought him looking tired and queer--ragged and scattered about the face, if you know what I mean, and his manner worn out. He said he had been writing hard, but his inspiration had somehow failed him, and he was dissatisfied with his work. His sense of humour was leaving him, or changing into something else, he said. There was something in the house, he declared, that"--she emphasized the words--"prevented his feeling funny."

"Something in the house that prevented his feeling funny," repeated the doctor. "Ah, now we're getting to the heart of it!"

"Yes," she resumed vaguely, "that's what he kept saying."

"And what was it he _did_ that you thought strange?" he asked sympathetically. "Be brief, or he may be here before you finish."

"Very small things, but significant it seemed to me. He changed his workroom from the library, as we call it, to the sitting-room. He said all his characters became wrong and terrible in the library; they altered, so that he felt like writing tragedies--vile, debased tragedies, the tragedies of broken souls. But now he says the same of the smoking-room, and he's gone back to the library."

"Ah!"

"You see, there's so little I can tell you," she went on, with increasing speed and countless gestures. "I mean it's only very small things he does and says that are queer. What frightens me is that he a.s.sumes there is some one else in the house all the time--some one I never see. He does not actually say so, but on the stairs I've seen him standing aside to let some one pa.s.s; I've seen him open a door to let some one in or out; and often in our bedroom he puts chairs about as though for some one else to sit in. Oh--oh yes, and once or twice," she cried--"once or twice--"

She paused, and looked about her with a startled air.

"Yes?"

"Once or twice," she resumed hurriedly, as though she heard a sound that alarmed her, "I've heard him running--coming in and out of the rooms breathless as if something were after him--"

The door opened while she was still speaking, cutting her words off in the middle, and a man came into the room. He was dark and clean-shaven sallow rather, with the eyes of imagination, and dark hair growing scantily about the temples. He was dressed in a shabby tweed suit, and wore an untidy flannel collar at the neck. The dominant expression of his face was startled--hunted; an expression that might any moment leap into the dreadful stare of terror and announce a total loss of self-control.

The moment he saw his visitor a smile spread over his worn features, and he advanced to shake hands.

"I hoped you would come; Mrs. Sivendson said you might be able to find time," he said simply. His voice was thin and reedy. "I am very glad to see you, Dr. Silence. It is 'Doctor,' is it not?"

"Well, I am ent.i.tled to the description," laughed the other, "but I rarely get it. You know, I do not practice as a regular thing; that is, I only take cases that specially interest me, or--"

He did not finish the sentence, for the men exchanged a glance of sympathy that rendered it unnecessary.

"I have heard of your great kindness."

"It's my hobby," said the other quickly, "and my privilege."

"I trust you will still think so when you have heard what I have to tell you," continued the author, a little wearily. He led the way across the hall into the little smoking-room where they could talk freely and undisturbed.

In the smoking-room, the door shut and privacy about them, Pender's att.i.tude changed somewhat, and his manner became very grave. The doctor sat opposite, where he could watch his face. Already, he saw, it looked more haggard. Evidently it cost him much to refer to his trouble at all.

"What I have is, in my belief, a profound spiritual affliction," he began quite bluntly, looking straight into the other's eyes.

"I saw that at once," Dr. Silence said.

"Yes, you saw that, of course; my atmosphere must convey that much to any one with psychic perceptions. Besides which, I feel sure from all I have heard, that you are really a soul-doctor, are you not, more than a healer merely of the body?"

"You think of me too highly," returned the other; "though I prefer cases, as you know, in which the spirit is disturbed first, the body afterwards."

"I understand, yes. Well, I have experienced a curious disturbance in--_not_ in my physical region primarily. I mean my nerves are all right, and my body is all right. I have no delusions exactly, but my spirit is tortured by a calamitous fear which first came upon me in a strange manner."

John Silence leaned forward a moment and took the speaker's hand and held it in his own for a few brief seconds, closing his eyes as he did so. He was not feeling his pulse, or doing any of the things that doctors ordinarily do; he was merely absorbing into himself the main note of the man's mental condition, so as to get completely his own point of view, and thus be able to treat his case with true sympathy. A very close observer might perhaps have noticed that a slight tremor ran through his frame after he had held the hand for a few seconds.

"Tell me quite frankly, Mr. Pender," he said soothingly, releasing the hand, and with deep attention in his manner, "tell me all the steps that led to the beginning of this invasion. I mean tell me what the particular drug was, and why you took it, and how it affected you--"

"Then you know it began with a drug!" cried the author, with undisguised astonishment.

"I only know from what I observe in you, and in its effect upon myself.

You are in a surprising psychical condition. Certain portions of your atmosphere are vibrating at a far greater rate than others. This is the effect of a drug, but of no ordinary drug. Allow me to finish, please.

If the higher rate of vibration spreads all over, you will become, of course, permanently cognisant of a much larger world than the one you know normally. If, on the other hand, the rapid portion sinks back to the usual rate, you will lose these occasional increased perceptions you now have."

"You amaze me!" exclaimed the author; "for your words exactly describe what I have been feeling--"

"I mention this only in pa.s.sing, and to give you confidence before you approach the account of your real affliction," continued the doctor.

"All perception, as you know, is the result of vibrations; and clairvoyance simply means becoming sensitive to an increased scale of vibrations. The awakening of the inner senses we hear so much about means no more than that. Your partial clairvoyance is easily explained.

The only thing that puzzles me is how you managed to procure the drug, for it is not easy to get in pure form, and no adulterated tincture could have given you the terrific impetus I see you have acquired. But, please proceed now and tell me your story in your own way."

"This _Cannabis indica_," the author went on, "came into my possession last autumn while my wife was away. I need not explain how I got it, for that has no importance; but it was the genuine fluid extract, and I could not resist the temptation to make an experiment. One of its effects, as you know, is to induce torrential laughter--"

"Yes; sometimes."

"--I am a writer of humorous tales, and I wished to increase my own sense of laughter--to see the ludicrous from an abnormal point of view.

I wished to study it a bit, if possible, and--"

"Tell me!"

"I took an experimental dose. I starved for six hours to hasten the effect, locked myself into this room, and gave orders not to be disturbed. Then I swallowed the stuff and waited."

"And the effect?"

"I waited one hour, two, three, four, five hours. Nothing happened. No laughter came, but only a great weariness instead. Nothing in the room or in my thoughts came within a hundred miles of a humorous aspect."

"Always a most uncertain drug," interrupted the doctor. "We make a very small use of it on that account."

"At two o'clock in the morning I felt so hungry and tired that I decided to give up the experiment and wait no longer. I drank some milk and went upstairs to bed. I felt flat and disappointed. I fell asleep at once and must have slept for about an hour, when I awoke suddenly with a great noise in my ears. It was the noise of my own laughter! I was simply shaking with merriment. At first I was bewildered and thought I had been laughing in dreams, but a moment later I remembered the drug, and was delighted to think that after all I had got an effect. It had been working all along, only I had miscalculated the time. The only unpleasant thing _then_ was an odd feeling that I had not waked naturally, but had been wakened by some one else--deliberately. This came to me as a certainty in the middle of my noisy laughter and distressed me."

"Any impression who it could have been?" asked the doctor, now listening with close attention to every word, very much on the alert.