It is half-past nine of a July evening. In a dining-room lighted by sconces, and apparelled in wall-paper, carpet, and curtains of deep vivid blue, the large French windows between two columns are open on to a wide terrace, beyond which are seen trees in darkness, and distant shapes of lighted houses. On one side is a bay window, over which curtains are partly drawn. Opposite to this window is a door leading into the hall.