In leaving the building Mr. Gryce almost ran into the arms of Perry. In his anxiety to be within call, the young detective had seated himself on the steps outside and now stood ready for any emergency.

Mr. Gryce’s spirits rose as he saw him there. The great door leading to the elevator opened not twenty feet to the left of him. Perhaps Perry had seen the woman and could tell which way she ran. Questions followed, rapid and to the purpose. Perry had seen a woman flash by. But she seemed to be in company with a man. He had not been able to see either clearly.

“Which way were they heading?” asked Mr. Gryce.

Perry told him.

It would look as though they were making for the station. Alarmed at the idea, Mr. Gryce stepped down into the road and endeavored to pierce the darkness in that direction. All he could see were the station lights. Everything else was in shadow. The night hung over all, and had it not been for the grinding of machinery in their rear, the silence would have been just as marked.

“Perry, is the way rough between here and the station — I mean, rough for me?”

“Not very, if you keep in the road.”

“Run ahead, then, and learn how soon the next train is due — any train, going north or going south — I don’t care which. If it is soon, look for a middle-aged woman in a striped dress, and if you can’t prevent her getting on, without a fracas, follow her yourself and never quit her — telegraphing me at the first opportunity. Run.”

Perry gave a leap and was soon swallowed up in the darkness which was intense as soon as he had passed beyond the glare from the factory. Mr. Gryce followed after, moving as quickly as he dared. It was not far to the station platform, but in his anxiety it seemed a mile; nor did he breathe with ease till he saw a flying shadow come between him and the station lights and knew that Perry had reached the platform.

It was just at the hour when the fewest trains pass, and Mr. Gryce was himself across the tracks and on the platform before a far-off whistle warned him that one was approaching. Looking hastily around, he saw Perry hurrying up behind him.

“No one,” said he. “No such person around.”

They waited. The train came in, stopped, took on two unimportant passengers and rushed away north.

“I’m afraid I shall have to ask you to stay here, Perry. It would be so easy for her to board one of these night trains and buy a ticket from the conductor.”

But as he spoke he paused, and gripping Perry’s arm, turned his ear to listen.

“A boat,” said he. “A small boat leaving shore.”

It was so. They could hear the dip of the oars distinctly in the quiet which had followed the departure of the train. No other sound but that was in the air, and it struck cold upon one old heart.

“It is she! I’m sure of it,” muttered Gryce.

“The man across the river has warned her — sent a boat for her, perhaps. Run down to the point and see if there is anyone there who saw her go.”

Perry slid into the night, and Mr. Gryce stood listening. The quiet dip of the oars was growing fainter every instant. The boat was rapidly withdrawing, carrying with it all hope of securing off-hand this desirable witness.

To be sure, there was nothing very serious in this. He had only to telephone across the river to have the woman detained till he could reach her himself in the early morning. Yet he felt unaccountably disturbed and anxious. For all his many experiences and a record which should have made him immune from the ordinary disappointments of life, he had never, or so it seemed to him, felt more thoroughly depressed or weary of the work which had given him occupation for more years than he liked to number, than in the few minutes of solitary waiting, with his face toward the river and the sense of some impending doom settling slowly over his aged heart.

But he was still too much the successful detective to allow his disheartenment to be seen by his admiring subordinate. As the latter approached, the old man’s countenance brightened, and nothing could have been more deceptive than the calmness he displayed when the fellow reported that he had just been talking to a man who had recognized the boat and the oarsman. It was the same boat and the same oarsman that had brought them over earlier in the day. He had made an extra trip at this most unusual hour, for the express purpose of taking this woman back.

“I suppose there is no possibility of your drumming up anyone to row us over in time to catch them?”

“None in the least. I have inquired.”

“Then follow me into the station. I have a few messages to send.”

Among these messages was a peremptory one to Sweetwater.

Morning! and an early crossing to the other side. Here a surprise awaited them. They found, on inquiry, that the man responsible for Madame’s flitting was not, as they had supposed, the hotel proprietor, but Phil himself, the good-natured, easily-im............