Coercion was regarded at the Retreat as an evil--that is to say, it was "thought abstractedly to have a tendency to retard the cure, by opposing the influence of the moral remedies employed"--but at the same time "a necessary evil," an unhappy alternative in certain cases. Practically, as we have seen, the amount of restraint was small; but no _rule_ of practice was laid down that it should never be resorted to. The abstract principle of non-restraint adopted at Lincoln and Hanwell was not enunciated. "We greatly prefer," observes the author of the "Description," "to lay down no absolute rule of non-restraint, but to refer to our resident officers the exercise of a sound discretion in each individual case." But the managers of the Retreat did undoubtedly lay down as a fundamental principle that "_coercion will diminish or increase as the moral treatment of the patient is more or less judicious_;"[137] and therefore, although they did not anticipate that personal restraint would be superseded by any other mode of treatment, this principle is broad enough to embrace all that has since followed in the way of non-restraint. The result, in the long run, of honestly carrying out the doctrine to its legitimate consequences, will not very widely differ from that reached by those who adopt "non-restraint" as an abstract theory in the first instance. Justice would scarcely be done to those who interested themselves in mental diseases during the latter half of the eighteenth and the commencement of the nineteenth century, if we did not give the titles of some of the works bearing on insanity which issued from the press during this period. A treatise on Madness was written in 1757 by Batty. Perfect wrote "Methods of Cure in some Particular Cases of Insanity" in 1778, and "Select Cases of Insanity" in 1787, and "Annals of Insanity" fourteen years later. Perfect's treatment of insanity mainly consisted in bleeding, setons, electricity, and the administration of emetics, digitalis, and antimony. Dr. T. Arnold published his "Observations on the Nature, etc., of Insanity," 1782. Harper published "A Treatise on the Real Cause and Cure of Insanity" in 1789--a work ridiculed by Pinel. Faulkner wrote his "Observations on the General and Improper Treatment of Insanity" in 1790; and Pargeter his "Observations on Maniacal Disorders" in 1792. What, if any, beneficial effect these works produced upon the condition of the insane in the British Isles, I am unable to say. Haslam wrote his "Observations on Madness" in 1798, and he was the author of several other works; but, whatever their value and interest, we know but too well the condition of the patients in the asylum of which he was the apothecary. Crichton published his "Inquiry into the Nature and Origin of Mental Derangement"--a work, certainly, of merit and the result of practical observation. In 1802 appeared "De intellectûs facultatum conditione in mentis Alienationis diversis