"Your acquaintance of the halting gait and high shoulder may or might have some hand in the affair," he finished. "My own opinion is he has not. The notion that you are being watched, is, if my view of the matter be correct, only a further development of the nervous excitement which has played you all sort of fantastic tricks since you came to this house. If anyone does wander through the gardens, I should set him down as a monomaniac or an intending burglar, and in any case the very best thing you can do is to pack up your traps and leave River Hall to its fate." I did not answer; indeed, I felt too sick at heart to do so. What he said was what other people would say. If I could not evolve some clearer theory than I had yet been able to hit on, I should be compelled to leave the mystery of River Hall just as I had found it. Miss Blake had, I knew, written to Mr. Craven that the house had better be let again, as there "was no use in his keeping a clerk there in free lodgings for ever": and now came Ned Munro, with his worldly wisdom, to assure me mine was a wild-goose chase, and that the only sensible course for me to pursue was to abandon it altogether. For the first time, I felt disheartened about the business, and I suppose I showed my disappointment, for Munro, drawing his chair nearer to me, laid a friendly hand on my shoulder and said: "Cheer up, Harry! never look so downhearted because your nervous system has been playing you false. It was a plucky thing to do, and to carry out; but you have suffered enough for honour, and I should not continue the experiment of trying how much you can suffer, were I in your shoes." "You are very kind, Munro," I answered; "but I cannot give up. If I had all the wish in the world to leave here to-night, a will stronger than my own would bring me back here to-morrow. The place haunts me. Believe me, I suffer less from its influence, seated in this room, than when I am in the office or walking along the Strand." "Upon the same principle, I suppose, that a murderer always carries the memory of his victim's face about with him; though he may have felt callously indifferent whilst the body was an actual presence." "Precisely," I agreed. "But then, my dear fellow, you are not a murderer in any sense of the word. You did not create the ghosts supposed to be resident here." "No; but I feel bound to find out who did," I answered. "That is, if you can, I suppose?" he suggested. "I feel certain I shall," was the answer. "I have an idea in my mind, but it wants shape. There is a mystery, I am convinced, to solve which, only the merest hint is needed."