Observations on Madness and Melancholy / Including Practical Remarks on those Diseases together with Cases and an Account of the Morbid Appearances on Dissection

by John Haslam

Considerable diversity of opinion has prevailed, whether insanity be hereditary or not; and much has been said on both sides of this question. Great ingenuity has been exerted to prove that this disease is accidental, or that there are sufficient causes to account for its occurrence, without supposing it one of those calamities that “flesh is heir to.” It has been argued, that, if the disease were hereditary, it ought uniformly to be so, and that the offspring of a mad parent should necessarily become insane.

All theories and reasonings appear to be good for as much as they prove; and if the term hereditary be employed with a degree of strictness, so as to denote certain and infallible transmission, such inevitable descent cannot be defended. Several instances have come under my observation where the children of an insane parent have not hitherto been affected with madness, and some have died early in life, without having experienced any derangement of mind. More time is therefore required.

All observations concur in acknowledging that there are many circumstances in which children resemble their parents. It is very common to see them resemble one of their parents in countenance, and when there are several children, some shall bear the likeness of the father and others of the mother. Children often possess the make and fashion of the body, peculiar to one or other of their parents, together with their gait and voice; but that which has surprized me most is the resemblance of the hand-writing. If a parent had taught his son to write, it might be expected that a considerable similarity would be detected; but in general the fact appears to be otherwise, for it seldom happens that the scholars, though constantly imitating the copy of the master, write at all like him, or like each other. In a few instances I have noticed a correct resemblance between the hand-writing of the father and son, where the former died before the latter had been taught the use of the pen, and who probably never saw the hand-writing of his father. The transmission of personal deformities is equally curious. I am acquainted with a person in this town, whose middle and ring finger are united, and act as one; all the children of this man carry the same defect. A toenail, particularly twisted, has been traced through three generations, on the same foot and toe. Abundant instances might be adduced on this subject; there is scarcely a family which cannot produce something in confirmation; and if to these circumstances in the human species, were to be added the experiments which have been made on the breeding of cattle, perhaps little doubt would remain.

The reasoners against the transmission of madness urge, that, if the contrary were true, we should by this time have detected the rule or law by which nature acts, and that we should have been able to determine,—First, whether the disorder descended to the male or female children accordingly as the father or mother was affected.—Secondly, which of the parents is most capable of transmitting the disease?—Thirdly, what alternations in the succession take place, does it shift from the male to the female line, and, does it miss a generation, and afterwards return?

These, and a multitude of other queries, might be proposed; I believe much faster than they could be answered. Nature appears to delight in producing new varieties, perhaps less in man than in other animals, and still less in the animal than in the vegetable kingdom. Before these subtile reasoners expect, from those who maintain that madness generally descends from the parent to the offspring, a developement of the laws by which Nature acts, it would be convenient first to settle whether in this matter she be under the dominion of any law whatever.

The investigation of the hereditary tendency of madness is an object of the utmost importance, both in a legal and moral point of view. Parents and guardians, in the disposal, or direction of the choice of their children in marriage, should be informed, that an alliance with a family, where insanity has prevailed, ought to be prohibited.

Having directed some attention to enquiries of this nature, I am enabled truly to state, that, where one of the parents have been insane, it is more than probable that the offsprings will be similarly affected.

Madness has many colours, and colours have many hues; actual madness is a severe calamity, yet experience has pointed out the treatment, and the law has permitted the imposition of the necessary restraint: but it very frequently occurs that the descendants from an insane stock, although they do not exhibit the broad features of madness, shall yet discover propensities, equally disqualifying for the purposes of life, and destructive of social happiness.

The slighter shades of this disease include eccentricity, low spirits, and oftentimes a fatal tendency to immoral habits, notwithstanding the inculcation of the most correct precepts, and the force of virtuous example.

In illustration of the fact, that the offsprings of insane persons are, ceteris paribus, more liable to be affected with madness than those whose parents have been of sound minds; it was my intention to have constructed a table, whereon might be seen the probably direct course of this disease, and also its collateral bearings: but difficulties have arisen. It appeared, on consideration, improper to attempt precision with that which was variable, and as yet unsettled; I have therefore been content to select a few histories from my book of notes, and to exhibit them in the rude state in which they were set down.