She had not learned to know the different lights.

When dusk came she was lost to her own knowledge.

She only knew that the sweet air blew upon her face and that she trusted her uncle.
The moonless night closed in.

Now and then, as they passed a friendly craft, evening greetings were spoken across the dark space.

By the time they got to the place for which they were bound they were floating almost alone upon the black water.
Johns descended into a small boat and secured the sailing-boat to the buoy which belonged to the house whither he was going, or rather, he thought that he secured it.
Helen heard the plash of his oars until he landed.