She had not the faintest idea what it could be, and though she sat up in bed and listened, she could not see or hear anything.

The house seemed quiet and still, and yet there were sounds--curious, mysterious sounds that ceased while she listened for them, and left her wondering if she were still dreaming, or if her ears were playing her tricks.

Her first fear was that there might be something the matter with Tony; then she thought of Dan.
"I must go and see," she thought, and slipped very gently out of bed and into her dressing-gown.

When she was outside the door she paused to listen.

Yes, there certainly were sounds, and they came from Dan's room, sounds of whispering and movements, and--yes, there was a curious smell.