Probably she cannot sleep well, and so walks in the garden.

Anyway this is none of our business, my man.

Where are Miss Natalie's apartments ?" "In the other wing, sir; the first door beyond the head of the stairs." "And the door you were asked to leave open ?" "At the farther end of the hall." As West made no further effort to continue the conversation, but began to carelessly roll a cigarette, Sexton slipped silently through the opening, the valise in his hand, and closed the door behind him.

West touched a match to the cigarette, scarcely aware of the action.
This attempt to dig information out of a servant was not a pleasant experience, yet he felt that in this case it was fully justified.

To be sure he had gained little, yet that little helped to clear away the fog, and sustain the girl's theory that she was being impersonated by another even to her own servants.