For the next few days I think I must have been nearer to a nervous breakdown than I am ever likely to be again. All the strain and the anxiety of the whole summer seemed to fall upon me in a mass; I had not the relief of taking arms against my trouble, nor of any better business than to brood and to remember, sifting misery by the hour in hopeless search after some grain of decision; and the heat and hurry of the city broke my natural sleep, and went to make a nightmare of my days. Maclean was with me a good deal, taking me with him into strange corners of the town, and trying his best to bring me out of myself; but I could not talk to him of what was on my mind, and the irritation of constant pretense to carelessness vitiated much of the relief he tried to give. Wherever I might be to appearance, the same Spartan Fox was at my breast—Carucci's story and Sheila's attempted contradiction, and the ambiguous trouble that overhung Lady and shut me out from her. I could not fathom it; and I dared not take dangerous action in the dark. Reid had passed through some scandal before his marriage; Sheila had admitted so much; and her denial that Miriam and Lady were the same had been involved in such a maze of surmise and superstition, so evidently and angrily put forward as a defense, that I could not believe what I would of it. It might well be that Mrs. Tabor was oppressed even to insanity by the situation. But what was the situation? If the mother's madness of bereavement were at the root of all, what had the family to conceal? Or why should not the remaining daughter marry whom she chose? Sheila's explanation of the first was absurdly tenuous; and the last she had not attempted to explain. No, there was one shadow over them all: the cause of the mother's grief was the cause of the daughter's terror, and of the irrational behavior of the sane and practical men of the family. I could find no alternative; either Mrs. Tabor was haunted by mediæval ghosts, or some part of the scandal must be true.

At last, one unbearably humid morning, when I was almost on the point of going blindly out to Stamford on the chance of any happening that might let my anxiety escape into action, of any opportunity that might force a climax, Mr. Tabor called me on the telephone.

"Hello, Mr. Crosby? Mr. Laurence Crosby?—Well, Crosby, this is Mr. Tabor talking. Are you free this morning, so that you can give us a few hours of your time? You can help us very much if you will."

"Certainly; I'll be out as soon as I can get a train." The idea of seeing Lady again was a compensation under any circumstances; but the next words destroyed that hope.

"No, don't do that. What I want of you is right there in New York." He hesitated a moment. "Hello—that—that same situation which occurred the other day, when you were alone in the house, and we were in town, has arisen again. You understand me?—We're looking after this neighborhood. The person in question has been gone an hour, leaving no word; may have gone to New York. Now, will you meet all trains until further notice, and keep your eyes open? Call us up about every half hour. In case of success, use your own judgment—don't excite any one, don't be left behind, and telephone as soon as possible. Am I making this explicit enough?"

"Yes, perfectly. I'm to meet trains, let matters take their own course as far as possible, keep in touch, and let you know."

"That's it exactly. I knew we could count on you."

I was not many minutes in getting to the Grand Central, laying my plan of action on the way. To be sure that no one arrived unobserved in that great labyrinth of tracks and exits was no such easy matter, even though I knew the point of departure. I began by a thorough search of the waiting-rooms. Then, finding, as I had expected, no trace of Mrs. Tabor, I learned the times and positions of all the Stamford trains, and set myself to meet each one as it arrived. I had to make certain of seeing every passenger, and at the same time to keep out of the expectant throng that crowded close to the restraining ropes on a similar errand; for if Mrs. Tabor should appear I must not seem to be watching for her. The next hour and a half was divided between studying the clock, running my eyes dizzily over streams of hurrying humanity, racing anxiously from place to place when a late train crowded close upon its successor, and snatching a moment at the telephone in the intervals of nervous waiting. Even so, I could not be morally sure that she might not slip by me somewhere unnoticed. And when at last I recognized her fragile figure far down the long platform, I was less excited than relieved.

She came on quickly, carrying a little shopping-bag, and stepping with a certain bird-like alertness. It was hard to imagine that this eager, pretty lady, with her spun-glass hair and her bright eyes, could be either ill or in trouble. I let her pass me, and followed at a little distance into the waiting-room; then crossed over and met her face to face by the telephone booths on the west side. Her greeting was a fresh surprise.

"Why, Mr. Crosby, this is delightfully fortunate! I was just going to call you up, and here you spring from the earth as if I had rubbed a magic ring. You must have known that I was thinking about you. You're not going away, are you? Or meeting any one?"