It was a satisfaction to me that my wife did not entertain the idea of deserting the northwestern part of London, in which I have lived from my boyhood, and which I regard as the pleasantest district in our modern Babylon. In no other part of London can you see in such perfection the tender green of spring, and enjoy air so pure and bracing, and there are summers when my wife agrees with me that it is a mistake to give up these advantages for the doubtful enjoyment and the distinct discomforts of a few weeks in the country. So, with my mind somewhat relieved, I started upon the expedition which was to lead me to the deserted house in Lamb's Terrace, and thence to the strange and thrilling incidents I am about to narrate. And I may premise here that I do not intend to attempt any explanation of them; I shall simply describe them as they occurred, and I shall leave the solution to students more deeply versed than myself in the mysteries of the visible and invisible life by which we are surrounded. I must, however, make one observation. There is in my mind no doubt that I was the chosen instrument in bringing to light the particulars of a foul and monstrous crime, which might otherwise have remained unrevealed till the Day of Judgment, when all things shall be made clear. Why I was thus inscrutably chosen, and was haunted by the Skeleton Cat until the moment arrived when I was to lay my hand upon the shoulder of the criminal and say, "Thou art the man!" is to me the most awful and inexplicable mystery in my life. In our search for a new house the story of one day is (with the single exception to which I have incidentally referred) the story of all the days so employed. We set out every morning, my wife fresh and cheerful, and I trotting patiently by her side; we returned home every evening worn out, disheartened, bedraggled, and generally demoralized. My condition was, of course, worse than that of my wife, whom a night's rest happily restored to strength and hope. I used to look at her across the breakfast table in wonder and admiration, for truly her vigor and powers of recuperation were surprising. "Are you quite well this morning?" I would ask. "Quite well," she would reply, smiling amiably at me. "I had a lovely night."