I stopped a few moments to consider what it could mean, and chose out of a hundred conjectures the most feasible, namely:—that it referred perhaps to the “getting up” of some portion of a lady’s dress, or knocking up some article of attire or convenience in a hurry. I asked persons connected with all sorts of handicrafts and small trades, and could get no satisfaction. I therefore determined to enquire at the “Knocking up” establishment itself. Thither, accordingly, I bent my steps. On asking for the master, a pale-faced asthmatic man came forward. I politely told him the object of my visit, adding, that from so small a return as 2d. a week, he ought to get at least half profit. “Why, to tell you the truth, Sir,” rejoined the honest fellow, “as my occupation requires no outlay or stock in trade, ’tis _all_ profit.” “Admirable profession!” I ejaculated, “If it is no secret, I should like to be initiated; for several friends of mine are very anxious to commence business on the same terms.” Not having the fear of rivalry before his eyes, he solved the mystery without any stipulations as to secrecy or premium. He said that he was employed by a number of young men and women who worked in factories, to call them up by a certain early hour in the morning; for if they happened to oversleep themselves and to arrive at the mill after work had commenced, they were liable to the infliction of a fine, and therefore, to insure being up in good time, employed him to “knock them up” at two-pence a week. On further enquiry, he told me that he himself earned fourteen shillings per week, and his son—only ten years old—awoke factory people enough to add four shillings more to his weekly income. He added, that a friend of his did a very extensive “knocking up” business, his connexion being worth thirty shillings per week; and one woman he knew had a circuit that brought her in twenty-four shillings weekly. There is an old saying, that one half the world does not know how the other half live. I question whether ninety-nine hundredths of your readers will have known till you permit me to inform them how our Manchester friends, in the “Knocking up” line, get a livelihood. STATISTICS OF FACTORY SUPERVISION. The Rev. Mr. Baker has recently issued a pamphlet, defending the moral tone of the factory system against the charges brought against it in the Rev. H. Worsley’s Prize Essay on Juvenile Depravity. We purposely abstain from discussing the merits of the controversy, believing that the truth lies between the two extremes advocated respectively by the reverend disputants. Mr. Henry, however, gives a table of statistics, an abstract of which we cannot withhold. It shows the number of spinning and power-loom weaving concerns in the principal manufacturing districts of Lancashire and Cheshire; also, the number of partners, so far as they are known to the public.