"Herbert is too considerate to disturb me, when his friends keep him up late," she said.
"On those occasions, as you may see for yourself, he has a bed in his dressing-room." Mrs.Presty passed through the dressing-room on her way out.

"A very comfortable-looking bed," she remarked, in a tone intended to reach her daughter's ears.

"I wonder Herbert ever leaves it." The way to her own bed-chamber led her by the door of Sydney's room.

She suddenly stopped; the door was not shut.

This was in itself a suspicious circumstance.
Young or old, ladies are not in the habit of sleeping with their bedroom doors ajar.