At the station, while awaiting the answer to his despatch, Armitage had questioned the agent as to whether any man of that description had arrived by the night train from the north.  He had seen none, he said, but there was Larsen over at the post-office store, who came down on that train; perhaps he could tell.  Oddly enough, Mr. Larsen recalled just such a party,—­tall, slim, dark, dark-bearded, with blue glasses and dark hat and clothes,—­but he was bound for Lakeville, the station beyond, and he remained in the car when he, Larsen, got off.  Larsen remembered the man well, because he sat in the rear corner of the smoker and had nothing to say to anybody, but kept reading a newspaper; and the way he came to take note of him was that while standing with two friends at that end of the car they happened to be right around the man.  The Saturday evening train from the city is always crowded with people from the river towns who have been up to market or the matinees, and even the smoker was filled with standing men until they got some thirty miles down.  Larsen wanted to light a fresh cigar, and offered one to each of his friends:  then it was found they had no matches, and one of them, who had been drinking a little and felt jovial, turned to the dark stranger and asked him for a light, and the man, without speaking, handed out a little silver match-box.  It was just then that the conductor came along, and Larsen saw his ticket.  It was a “round trip” to Lakeville:  he was evidently going there for a visit, and therefore, said Larsen, he didn’t get off at Sablon Station, which was six miles above.

But Armitage knew better.  It was evident that he had quietly slipped out on the platform of the car after the regular passengers had got out of the way, and let himself off into the darkness on the side opposite the station.  Thence he had an open and unimpeded walk of a few hundred yards until he reached the common, and then, when overtaken by the hotel omnibus, he could jump aboard and ride.  There was only one road, only one way over to the hotel, and he could not miss it.  There was no doubt now that, whoever he was, the night visitor had come down on the evening train from the city; and his return ticket would indicate that he meant to go back the way he came.  It was half-past ten when that train arrived.  It was nearly midnight when the man appeared at the cottage window.  It was after two when Armitage gave up the search and went to bed.  It was possible for the man to have walked to Lakeville, six miles south, and reached the station there in abundant time to take the up-train which passed Sablon, without stopping, a little before daybreak.  If he took that train, and if he was Jerrold, he would have been in the city before seven, and could have been at Fort Sibley before or by eight o’clock.  But Chester’s despatch showed clearly that at 8.30—­the hour for signing the company morning reports—­Mr. Jerrold was not at his post.