A sharp click was heard, and the next moment through a broad pane of glass a faint twilight crept into the carriage.

The blind had been raised from one of the windows.

It was two o'clock on a morning of July and the dawn was breaking.

Very swiftly the daylight broadened, and against the window there came into view the profile of a girl's head and face.

Seen as Mrs.Thesiger saw it, with the light still dim behind it, it was black like an ancient daguerreotype.