These precautions well understood by both of us, I went home. On opening the outer door of our chambers with my key, I found a letter in the box, directed to me; a very dirty letter, though not ill-written. It had been delivered by hand (of course, since I left home), and its contents were these:— “If you are not afraid to come to the old marshes to-night or to-morrow night at nine, and to come to the little sluice-house by the limekiln, you had better come.