"We ought not to act at all," he answered. "We had better wait and see what his next move will be. He is certain to take some step. He will try to get you out of this house by hook or by crook. He has already striven to effect his purpose through Miss Elmsdale, and failed. It will therefore be necessary for him to attempt some other scheme. It is not for me to decide on the course he is likely to pursue; but, if I were in your place, I should stay within doors at night. I should not sit in the dark near windows still unshuttered. I should not allow any strangers to enter the house, and I should have a couple of good dogs running loose about the premises. I have brought Brenda with me as a beginning, and I think I know where to lay my hand on a good old collie, who will stay near any house I am in, and let no one trespass about it with impunity." "Good heavens! Munro, you don't mean to say you think the man would _murder_ me!" I exclaimed. "I don't know what he might, or might not do," he replied. "There is something about this house he is afraid may be found out, and he is afraid you will find it out. Unless I am greatly mistaken, a great deal depends upon the secret being preserved intact. At present we can only surmise its nature; but I mean, in the course of a few days, to know more of Mr. Harringford's antecedents than he might be willing to communicate to anyone. What is the matter with you, Hal? You look as white as a corpse." "I was only thinking," I answered, "of one evening last week, when I fell asleep in the drawing-room, and woke in a fright, imagining I saw that horrid light streaming out from the library, and a face pressed up close to the glass of the window on my left hand peering into the room." "I have no doubt the face was there," he said, gravely; "but I do not think it will come again, so long as Brenda is alive. Nevertheless, I should be careful. Desperate men are capable of desperate deeds." The first post next morning brought me a letter from Mr. Craven, which proved Mr. Harringford entertained for the present no intention of proceeding to extremities with me. He had been in Buckingham Street, so said my principal, and offered to buy the freehold of River Hall for twelve hundred pounds. Mr. Craven thought he might be induced to increase his bid to fifteen hundred, and added: "Miss Blake has half consented to the arrangement, and Miss Elmsdale is eager for the matter to be pushed on, so that the transfer may take place directly she comes of age. I confess, now an actual offer has been made, I feel reluctant to sacrifice the property for such a sum, and doubt whether it might not be better to offer it for sale by auction--that is, if you think there is no chance of your discovering the reason why River Hall bears so bad a name. Have you obtained any clue to the mystery?" To this I replied in a note, which Munro himself conveyed to the office.