"That's what I should very much like to ascertain."

"I don't quite follow you. Do you mean that you don't know who she is?"

"I only know that I've been away all day, and that on my return I find her there. How she got there I can't say--but she seems determined to keep me out."

"You don't mean that! And have you no notion who the woman is? She looks half mad."

"I should think she must be quite mad. It's the woman who forced herself into the house the day before yesterday after you had gone--that's all I know of her. This time she is not alone; she has a man in there with her."

"A man! Not--Ballingall?"

"No, not Ballingall. At least, I only caught a glimpse of him--but it's not the man who was watching you. From her behaviour the woman must be perfectly insane."

"We'll soon make an end of her, insane or not."

Graham went to the window. The woman, completely unabashed, had remained right in front of it, an observant spectator of their proceedings. He spoke to her.

"Open the door at once!"