The doctor stretched his arm out and took the white cloth from the bowl.

It was perhaps imagination that persuaded me the red glare of the lamps grew fainter and the air over the table before us thickened.  I had been expecting something for so long that the movement of my companions, and the lifting of the cloth, may easily have caused the momentary delusion that something hovered in the air before my face, touching the skin of my cheeks with a silken run.  But it was certainly not a delusion that the Colonel looked up at the same moment and glanced over his shoulder, as though his eyes followed the movements of something to and fro about the room, and that he then buttoned his overcoat more tightly about him and his eyes sought my own face first, and then the doctor’s.  And it was no delusion that his face seemed somehow to have turned dark, become spread as it were with a shadowy blackness.  I saw his lips tighten and his expression grow hard and stern, and it came to me then with a rush that, of course, this man had told us but a part of the experiences he had been through in the house, and that there was much more he had never been able to bring himself to reveal at all.  I felt sure of it.  The way he turned and stared about him betrayed a familiarity with other things than those he had described to us.  It was not merely a sight of fire he looked for; it was a sight of something alive, intelligent, something able to evade his searching; it was a person.  It was the watch for the ancient Being who sought to obsess him.

And the way in which Dr. Silence answered his look—­though it was only by a glance of subtlest sympathy—­confirmed my impression.

“We may be ready now,” I heard him say in a whisper, and I understood that his words were intended as a steadying warning, and braced myself mentally to the utmost of my power.

Yet long before Colonel Wragge had turned to stare about the room, and long before the doctor had confirmed my impression that things were at last beginning to stir, I had become aware in most singular fashion that the place held more than our three selves.  With the rising of the wind this increase to our numbers had first taken place.  The baying of the hounds almost seemed to have signalled it.  I cannot say how it may be possible to realise that an empty place has suddenly become—­not empty, when the new arrival is nothing that appeals to any one of the senses; for this recognition of an “invisible,” as of the change in the balance of personal forces in a human group, is indefinable and beyond proof.  Yet it is unmistakable.  And I knew perfectly well at what given moment the atmosphere within these four walls became charged with the presence of other living beings besides ourselves.  And, on reflection, I am convinced that both my companions knew it too.

“Watch the light,” said the doctor under his breath, and then I knew too that it was no fancy of my own that had turned the air darker, and the way he turned to examine the face of our host sent an electric thrill of wonder and expectancy shivering along every nerve in my body.