"Exactly; how to marry that girl before day after to-morrow. That's the problem, Mr. Carden!—not whether you are capable of falling in love with her. I have seen her; I know you can't avoid falling in love with her. Nobody could. I myself am on the verge of it; and I am fifty: you can't avoid loving her."

"If that were so," said Carden gravely; "if I were really going to fall in love with her—I would not care a rap about my Aunt Tabby and her money—"

"You ought to care about it for this young girl's sake. That legacy is virtually hers, not yours. She has a right to it. No man can ever give enough to the woman he loves; no man has ever done so. What she gives and what he gives are never a fair exchange. If you can balance the account in any measure, it is your duty to do it. Mr. Carden, if she comes to love you she may think it very fine that you bring to her your love, yourself, your fame, your talents, your success, your position, your gratifying income. But I tell you it's not enough to balance the account. It is never enough—no, not all your devotion to her included! You can never balance the account on earth—all you can do is to try to balance it materially and spiritually. Therefore I say, endow her with all your earthly goods. Give all you can in every way to lighten as much as possible man's hopeless debt to all women who have ever loved."

"You talk about it as though I were already committed," said Carden, astonished.

"You are, morally. For a month I have, without her knowledge, it is true, invaded the privacy of a very lovely young girl—studied her minutely, possessed myself of her history, informed myself of her habits. What excuse had I for this unless I desired her happiness and yours? Nobody could offer me any inducement to engage in such a practice unless I believed that the means might justify a moral conclusion. And the moral conclusion of this investigation is your marriage to her."

"Certainly," said Carden uneasily, "but how are we going to accomplish it by to-morrow? How is it going to be accomplished at all?"

The Tracer of Lost Persons rose and began to pace the long rug, clasping his hands behind his back. Minute after minute sped; Carden stared alternately at Mr. Keen and at the blue sky through the open window.

"It is seldom," said Mr. Keen with evident annoyance, "that I personally take any spectacular part in the actual and concrete demonstrations necessary to a successful conclusion of a client's case. But I've got to do it this time."

He went to a cupboard, picked out a gray wig and gray side whiskers and deliberately waved them at Carden.

"You see what these look like?" he demanded.