TWO:There are some crimes which are at the same time of common occurrence and of difficult proof. In them the difficulty of proof is equivalent to a probability of innocence; and the harm of their impunity being so much the less to be considered as their frequency depends on principles other than the risk of punishment, the time for inquiry and the period of prescription ought both to be proportionately less. Yet[161] cases of adultery and pederasty, both of difficult proof, are precisely those in which, according to received principles, tyrannical presumptions of quasi-proofs and half-proofs are allowed to prevail (as if a man could be half-innocent or half-guilty, in other words, half-punishable or half-acquittable); in which torture exercises its cruel sway over the person of the accused, over the witnesses, and even over the whole family of an unfortunate wretch, according to the coldly wicked teaching of some doctors of law, who set themselves up as the rule and standard for judges to follow. THREE:But undoubtedly punishment, although in its origin and present intention vindictive, must exercise a certain preventive force against crime, and this preventive force can scarcely be estimated, for that which is prevented is, of course, not seen. But the efficiency of punishment as a deterrent is proportioned to its certainty, and there is a large element of uncertainty that can never be eliminated. For every malefactor there are two hopes: first, that he may escape detection or apprehension; secondly, that he may escape conviction. That his hopes of impunity are not without reason greater than his fears of punishment the following facts attest. THREE:But there was another side to the brightness of this success. In literature as in war no position of honour can be won or held without danger, and of this Beccaria seems to have been conscious when he[15] pleaded against the charge of obscurity, that in writing he had had before his eyes the fear of ecclesiastical persecution. His love for truth, he confessed, stopped short at the risk of martyrdom. He had, indeed, three very clear warnings to justify his fears. Muratori, the historian, had suffered much from accusations of heresy and atheism, and had owed his immunity from worse consequences chiefly to the liberal protection of Pope Benedict XIV. The Marquis Scipio Maffei had also incurred similar charges for his historical handling of the subject of Free-will. But there was even a stronger warning than these, and one not likely to be lost on a man with youth and life before him; that was the fate of the unfortunate Giannone, who, only sixteen years before Beccaria wrote, had ended with his life in the citadel of Turin an imprisonment that had lasted twenty years, for certain observations on the Church of Rome which he had been rash enough to insert in his ��History of Naples.��