It was a particularly fine night, mild, but not very clear, as a slight mist often rises from the river after a hot day in summer.

I may have been there about ten minutes, no longer, when I saw the study window of The Hollies thrown open, and Mr.Grant's figure was silhouetted by the lamp behind him.

He seemed to be listening for something, so I, who must have heard any unusual sound, listened too.

There was nothing.

I could hear the ripple of the river beneath the bridge, so everything was very still.
After a minute, or two, perhaps--no longer--Mr.Grant went in, and closed the window.