If these lines are not Mr Sadler's, we heartily beg his pardon for our suspicion--a suspicion which, we acknowledge, ought not to be lightly entertained of any human being. We can only say that we never met with them before, and that we do not much care how long it may be before we meet with them, or with any others like them, again. The spirit of this work is as bad as its style. We never met with a book which so strongly indicated that the writer was in a good humour with himself, and in a bad humour with everybody else; which contained so much of that kind of reproach which is vulgarly said to be no slander, and of that kind of praise which is vulgarly said to be no commendation. Mr Malthus is attacked in language which it would be scarcely decent to employ respecting Titus Oates. "Atrocious," "execrable," "blasphemous," and other epithets of the same kind, are poured forth against that able, excellent, and honourable man, with a profusion which in the early part of the work excites indignation, but after the first hundred pages, produces mere weariness and nausea. In the preface, Mr Sadler excuses himself on the plea of haste. Two-thirds of his book, he tells us, were written in a few months. If any terms have escaped him which can be construed into personal disrespect, he shall deeply regret that he had not more time to revise them. We must inform him that the tone of his book required a very different apology; and that a quarter of a year, though it is a short time for a man to be engaged in writing a book, is a very long time for a man to be in a passion. The imputation of being in a passion Mr Sadler will not disclaim. His is a theme, he tells us, on which "it were impious to be calm;" and he boasts that, "instead of conforming to the candour of the present age, he has imitated the honesty of preceding ones, in expressing himself with the utmost plainness and freedom throughout." If Mr Sadler really wishes that the controversy about his new principle of population should be carried on with all the license of the seventeenth century, we can have no personal objections. We are quite as little afraid of a contest in which quarter shall be neither given nor taken as he can be. But we would advise him seriously to consider, before he publishes the promised continuation of his work, whether he be not one of that class of writers who stand peculiarly in need of the candour which he insults, and who would have most to fear from that unsparing severity which he practises and recommends.