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.