Her smile stung him. "Catherine," he said sternly, "I go because I must—because I dare not stay. You are a woman and a saint, I a man and a sinner. I've been a fool and worse than a fool. You say that Charles to-day called me false friend, traitor! Catherine—Charles spoke more truly than he knew."

His burning eyes held her fascinated. The tears had dried on her cheeks. She was thirstily absorbing the words as they fell now slowly, now quickly, from his lips.

But what was this he was saying? "Catherine, do you wish me to go on?" Oh, cruel! Cruel to put this further weight on her conscience! But she made a scarcely perceptible movement of assent—and again he spoke.

"Years ago I thought I loved you. I went away, as you know well, because of that love. You had chosen Charles—Charles in many ways the better fellow of the two. I went away thinking myself sick with love of you, but it was false—only my pride had been hurt. I did not love you as I loved myself. And when I got clear away, in a new place, among new people"—he hesitated and reddened darkly—"I forgot you! I vow that when I came back I was cured—cured if ever a man was! It was of Charles, not of you, Catherine, that I thought on my way home. To me Charles and you had become one. I swear it!" He repeated: "To me you and Charles were one."

He waited a long moment, and then, more slowly, he went on, as if pleading with himself—with her: "You know what I found here in place of what I had left? I found Charles a——"

Catherine Nagle shrank back. She put up her right hand to ward off the word, and Mottram, seizing her hand, held it in his with a convulsive clasp. "'Twas not the old feeling that came back to me—that I again swear, Catherine. 'Twas something different—something infinitely stronger—something that at first I believed to be all noble——"

He stopped speaking, and Catherine Nagle uttered one word—a curious word. "When?" she asked, and more urgently again she whispered, "When?"

"Long before I knew!" he said hoarsely. "At first I called the passion that possessed me by the false name of 'friendship.' But that poor hypocrisy soon left me! A month ago, Catherine, I found myself wishing—I'll say this for myself, it was for the first time—that Charles was dead. And then I knew for sure what I had already long suspected—that the time had come for me to go——"

He dropped her hand, and stood before her, abased in his own eyes, but one who, if a criminal, had had the strength to be his own judge and pass heavy sentence on himself.

"And now, Catherine—now that you understand why I go, you will bid me God-speed. Nay, more"—he looked at her, and smiled wryly—"if you are kind, as I know you to be kind, you will pray for me, for I go from you a melancholy, as well as a foolish man."