"Ye've been—" Sheila shot a quick glance at me. "Well, there'll be no need, Mr. Crosby, unless ye were to come to Stamford yourself anyway," and she began to inquire volubly after the health of the family.

Mrs. Tabor turned to me. "There really is nothing for you to do, Mr. Crosby, except to come soon and see me again," she said brightly. "I'm quite well, and I'm in safe hands, as you see—"

So far as I could tell, she was right; and I had no further need of overriding dismissal. I saw them both safely on the train, and hurried back; resolved to reach the bottom of at least this new mystery before I slept that night. My telephone call was answered by Reid, upon whom I wasted no unnecessary words, telling him only that Mrs. Tabor had been continuously with me, and was now on her way home in charge of Sheila.

"Why on earth didn't you 'phone before?" he snapped.

"Couldn't," said I shortly. "Good-by," and I raced for the subway.

A north-bound express was just leaving, and I had barely time to squeeze inside the door. The nearest station to the house would be Sixty-sixth Street; but by taking the express to Seventy-second, and running back on a local, I should save time. I hung on my strap, fidgeting with impatience while we howled through the clashing darkness and flashed past the blurred brilliancy of the stations. As we passed Sixty-sixth Street, a local drew out in the same direction as ourselves, running for a moment side by side with us before it fell behind. Its rows of lighted windows balanced almost within reach; and close inside, in one of the cross-seats amidships of the car, sat the man whose mere presence had so terrified Mrs. Tabor.

There was no mistaking that face, even if the silk hat and formal frock-coat had not been at that season almost an identification in themselves. I could as soon have mistaken Ibsen or Napoleon appearing before me in the flesh. The massive head was bent forward thoughtfully, and one broad white hand lay loose along the window-sill. I noticed a plain gold ring on the little finger. Then, as the express began to slacken speed, the window moved slowly past me and out of sight ahead. I had a strong sense of having seen the face many times before, though, try as I would, I could not fit it to a name. He was either some person well enough known to have his picture often in print or else the striking distinction of his features had given me that impression.

The local was standing at the platform as we drew into Seventy-second Street, and I pushed out and across to it with small regard for the amenities of the crowded station. A score of people, it seemed, were possessed of personal designs to block my way. I dodged a chanticleer hat, caromed off a hot and angry commuter or so, and found myself scrambling at the tail of the impatient cluster before the sliding-doors.

"Little lively, please!" roared the guard. "Lennux 'n West Farms, local train! Both gates!"

I did my best, but there were too many ahead of me. Even as I reached for that grip on the door-casing, which meant the right to squeeze inside, the door clicked shut before my face; and two dull clanks of the gong sealed my disappointment. I ran wildly along the train, trying to overtake the relay of sliding doors and jangling bells; but it was of no use. Then for an infuriating minute or two the train stood still, locked and inviolable, while the station alarm chattered overhead, and through the gleaming window I could see my man sitting calmly in his place. As it creaked out into the darkness, another express growled in behind me; and I had still presence of mind enough to slip aboard. My one chance was that we might overtake that local in a favorable spot.