All these cases show us that the gradations and transitions between sanity and insanity are far from being as hypothetical as Livi asserts them to be. Moreover, all this is in perfect harmony with the eternal evolution which we see going on in the ample realm of nature, which, as has been well said, never proceeds by leaps, but by successive and gradual transformations. Now, it is natural that, as these gradations exist in this very strange form of literary insanity, they should also be found in the forms of criminal insanity, and that, in consequence, many of those asserted to be guilty or mad, are only half responsible, although no human thought can trace the limits with entire certainty. It is well to observe here, what a different appearance madness assumes, according to the age in which it occurs. Had Bosisio lived in the Middle Ages, or in Spain or Mexico at a later period, the kind-hearted liberator of birds, the martyr for posterity, would have become a St. Ignatius or a Torquemada--the Positivist atheist an ultra-Catholic, commanded by a cruel Deity to immolate human victims; but Bosisio was an Italian, living in 1870. This case affords an excellent explanation of the occurrence, in remote times, and among savage or slightly civilized nations, of numerous outbreaks of epidemic insanity; and shows that many historical events may have been the result of mania on the part of one or more persons. Cases in point are those of the Anabaptists, the Flagellants, the witch-mania, the Taeping revolution. Mental aberration gives rise in some men to ideas which, though bizarre, are sometimes gigantic and rendered more efficacious by a singular force of conviction, so as to sweep along the feeble-minded multitude, who are all the more attracted by any singularity in dress, attitudes or abstinence (which such disease alone can suggest and render possible), that these phenomena are made inexplicable to them (and therefore worthy of veneration) by their ignorance and barbarism. The ignorant man always adores what he cannot understand. Our poor sufferer from hallucinations wanted nothing but a favourable epoch to impress his ideas on the multitude--neither muscular strength, nor a certain vigour of thought, nor extraordinary endurance under privations, nor disinterestedness, nor conviction. At another epoch, Italy would have found her Mahomet in Bosisio. _Mattoids in Art._--At the competition opened at Rome for designs for a proposed monument to Victor Emmanuel--the subject being an international one--mattoids came forward in crowds. In fact, we find, in Dossi’s curious book, not less than 39 out of 296 (13 per cent.), a number which would be raised to 25 per cent. if we add 38 more, who, in addition to their eccentricity, gave tokens of being imbecile.