But here Lord Melchester rose from the table. The conversations broke into fragments. I felt that I was pale to the lips.

We passed into the drawing-room. The ladies were grouped together at one end, near the piano. Margot was among them. She was, as usual, dressed in white, and round the bottom of her gown there was an edging of snow-white fur. As we came in, she moved away from the piano to a sofa at some distance, and sank down upon it. Professor Black, who had entered the room at my side, seized my arm gently.

“Now, that lady,” he whispered in my ear—“I don’t know who she may be, but she is intensely cat-like. I observed it before dinner. Did you notice the way she moved just then—the soft, yielding, easy manner in which she sat down, falling at once, quite naturally, into a charming pose? And her china-blue eyes are——”

“She is my wife, Professor,” I interrupted harshly.

He looked decidedly taken aback.

“I beg your pardon; I had no idea. I did not enter the drawing-room to-night till after you arrived. I believed that lady was one of my fellow-guests in the house. Let me congratulate you. She is very beautiful.”

And then he mingled rather hastily in the group near the piano.

The man is mad, I know—mad as a hatter on one point, like so many clever men. He sees the animal in every person he meets just because his preposterous theory inclines him to do so. Having given in his adherence to it, he sees facts not as they are, but as he wishes them to be; but he shall not carry me with him. The theory is his, not mine. It does not hold water for a moment. I can laugh at it now, but that night I confess it did seize me for the time being. I could scarcely talk; I found myself watching Margot with a terrible intentness, and I found myself agreeing with the Professor to an extent that made me marvel at my own previous blindness.

There was something strangely feline about the girl I had married—the soft, white girl who was becoming terrible to me, dear though she still was and must always be. Her movements had the subtle, instinctive and certain grace of a cat’s. Her cushioned step, which had often struck me before, was like the step of a cat. And those china-blue eyes! A sudden cold seemed to pass over me as I understood why I had recognised them when I first met Margot. They were the eyes of the animal I had tortured, the animal I had killed. Yes, but that proved nothing, absolutely nothing. Many people had the eyes of animals—the soft eyes of dogs, the furtive, cruel eyes of tigers. I had known such people. I had even once had an affair with a girl who was always called the shot partridge, because her eyes were supposed to be like those of a dying bird. I tried to laugh to myself as I remembered this. But I felt cold, and my senses seemed benumbed as by a great horror. I sat like a stone, with my eyes fixed upon Margot, trying painfully to read into her all that the words of Professor Black had suggested to me—trying, but with the wish not to succeed. I was roused by Lady Melchester, who came toward me asking me to do something, I forget now what. I forced myself to be cheerful, to join in the conversation, to seem at my ease; but I felt like one oppressed with nightmare, and I could scarcely withdraw my eyes from the sofa where my wife was sitting. She was talking now to Professor Black, who had just been introduced to her; and I felt a sudden fury in my heart as I thought that he was perhaps dryly, coldly, studying her, little knowing what issues—far-reaching, it might be, in their consequences—hung upon the truth or falsehood of his strange theory. They were talking earnestly, and presently it occurred to me that he might be imbuing Margot with his pernicious doctrines, that he might be giving her a knowledge of her own soul which now she lacked. The idea was insupportable. I broke off abruptly the conversation in which I was taking part, and hurried over to them with an impulse which must have astonished anyone who took note of me. I sat down on a chair, drew it forward almost violently, and thrust myself in between them.

“What are you two talking about?” I said, roughly, with a suspicious glance at Margot.