The commission of a great or extraordinary crime to this day produces, not unfrequently, a kind of mania of imitation in the district in which it happened. I have known incidents, falsely called religious, to occasion similar events; and what is remarkable, the scene or place of the _first_ event seemed to favour its repetition, by other persons approaching it. Thus a supposed miracle having been performed before the gate of the convent of St. Genevieve, such a number of similar occurrences happened on the same spot in a few days, that the police was compelled to post a peremptory notice on the gate, prohibiting any individual from working miracles on the place in question. When the locality was thus shut up, the _thaumaturgia_ ceased. It is not long since we witnessed in Paris two events of a similar character. About four years ago, at the Hotel des Invalides, a veteran hung himself on the threshold of one of the doors of a corridor. No suicide had occurred in the establishment for two years previously, but in the succeeding fortnight five invalids hung themselves on the same cross-bar, and the governor was obliged to shut up the passage. During the last days of the empire, again, an individual ascended the column in the Place Vendome, and threw himself down and was dashed to pieces. The event excited a great sensation; and in the course of the ensuing week, _four persons_ imitated the example, and the police were obliged to proscribe the entrance to the column. The same mania was almost induced by the suicide of a foolish girl, who leaped from the balcony of our own city column on Fish-street Hill. Indeed Monseigneur Mare, of Paris, alludes to a society enrolled for the mere purpose of suicide; and there was an annual ballot to decide which of these miserable creatures should be immolated _as the suicide of the year_!! Dr. Burrows, I remember also, relates cases analogous to these. They occurred in the ranks of some army on the continent, in which there was an epidemic propensity to suicide, until the general began to hang the soldiers on trees as scarecrows. The mania, as you may believe, very soon subsided.