"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.