"I am unable to do that, either."

Connery spoke again to the Pullman conductor, and they conversed inaudibly for a minute. "That is all, then," Connery said finally.

He signed his name to the sheet on which he had written Eaton's answers, and handed it to the Pullman conductor, who also signed it and returned it to him; then they went on to the passenger now occupying Section Four, without making any further comment.

Eaton abandoned his idea of going to the rear of the train; he sat down, picked up his magazine and tried to read; but after an instant, he leaned forward and looked at himself in the little mirror between the windows. It reassured him to find that he looked entirely normal; he had been afraid that during the questioning he might have turned pale, and his paleness—taken in connection with his inability to answer the questions—might have seriously directed the suspicions of the conductors toward him. The others in the car, who might have overheard his refusal to reply to the questions, would be regarding him only curiously, since they did not know the real reasons for the examination. But the conductors—what did they think?

Already, Eaton reflected, before the finding of the senseless form of Basil Santoine, there had occurred the disagreeable incident of the telegram to attract unfavorable attention to him. On the other hand, might not the questioning of him have been purely formal? Connery certainly had treated him, at the time of the discovery of Santoine, as one not of the class to be suspected of being the assailant of Santoine. Avery, to be sure, had been uglier, more excited and hostile; but Harriet Santoine again had treated him trustfully and frankly as one with whom thought of connection with the attack upon her father was impossible. Eaton told himself that there should be no danger to himself from this inquiry, directed against no one, but including comprehensively every one on the train.

As Eaton pretended to read, he could hear behind him the low voices of the conductors, which grew fainter and fainter as they moved further away, section by section, down the car. Finally, when the conductors had left the car, he put his magazine away and went into the men's compartment to smoke and calm his nerves. His return to America had passed the bounds of recklessness; and what a situation he would now be in if his actions brought even serious suspicions against him! He finished his first cigar and was debating whether to light another, when he heard voices outside the car, and opening the window and looking out, he saw Connery and the brakeman struggling through the snow and making, apparently, some search. They had come from the front of the train and had passed under his window only an instant before, scrutinizing the snowbank beside the car carefully and looking under the car—the brakeman even had crawled under it; now they went on. Eaton closed the window and lighted his second cigar. Presently Connery passed the door of the compartment carrying something loosely wrapped in a newspaper in his hands. Eaton finished his cigar and went back to his seat in the car.

As he glanced at the seat where he had left the magazine and his locked traveling-bag, he saw that the bag was no longer there. It stood now between the two seats on the floor, and picking it up and looking at it, he found it unfastened and with marks about the lock which told plainly that it had been forced.

His quick glance around at the other passengers, which showed him that his discovery of this had not been noticed, showed also that they had not seen the bag opened. They would have been watching him if they had; clearly the bag had been carried out of the car during his absence, and later had been brought back. He set it on the floor between his knees and checked over its contents. Nothing had been taken, so far as he could tell; for the bag had contained only clothing, the Chinese dictionary and the box of cigars, and these all apparently were still there. He had laid out the things on the seat across from him while checking them up, and now he began to put them back in the bag. Suddenly he noticed that one of his socks was missing; what had been eleven pairs was now only ten pairs and one odd sock.

The disappearance of a single sock was so strange, so bizarre, so perplexing that—unless it was accidental—he could not account for it at all. No one opens a man's bag and steals one sock, and he was quite sure there had been eleven complete pairs there earlier in the day. Certainly then, it had been accidental: the bag had been opened, its contents taken out and examined, and in putting them back, one sock had been dropped unnoticed. The absence of the sock, then, meant no more than that the contents of the bag had been thoroughly investigated. By whom? By the man against whom the telegram directed to Lawrence Hillward had warned Eaton?

Ever since his receipt of the telegram, Eaton—as he passed through the train in going to and from the diner or for other reasons—had been trying covertly to determine which, if any one, among the passengers was the "one" who, the telegram had warned him, was "following" him. For at first he had interpreted it to mean that one of "them" whom he had to fear must be on the train. Later he had felt certain that this could not be the case, for otherwise any one of "them" who knew him would have spoken by this time. He had watched particularly for a time the man who had claimed the telegram and given the name of Hillward; but the only conclusion he had been able to reach was that the man's name might be Hillward, and that coincidence—strange as such a thing seemed—might have put aboard the train a person by this name. Now his suspicions that one of "them" must be aboard the train returned.