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chap. xvi.
A PROBABLE CONJECTURE.
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has been suggested as accounting for the crétinism of the Rhone valley.

Others have imagined that intemperance,[1] poor living, foul habits, and personal uncleanliness, sow the seeds of crétinism, and this opinion is entitled to full consideration. Intemperance of divers kinds is fruitful in the production of insanity,[2] and herding together in filthy dwellings, with little or no ventilation, may possibly deteriorate physique, as much as extreme indulgence may the mind. These ideas are popularly entertained because crétins are more numerous amongst the lower orders than amongst the well-to-do classes. Yet they must, each and all, be regarded as inadequate to account for the disease, still less to explain its excess in the centre of the valley. For in these respects there is little or no distinction between it, the two extremities, and the neighbouring districts.

A conjecture remains to be considered regarding the origin of crétinism, which is floating in the minds of many persons (although it is seldom expressed), which carries with it an air of probability that is wanting in the other explanations, and which is supported by admitted facts.

The fertility of the Valley of Aosta is proverbial. It is covered with vineyards and corn-fields; flocks and herds abound in it; and its mineral resources are great. There is enough and to spare both for man and beast. There are poor in the valley, as there are everywhere, but life is so far easy that they are not driven to seek for subsistence in other places, and remain from generation to

  1. An instance was mentioned to me, in 1869, of a small proprietor in the Valley of Aosta, who had a wife and several healthy children, having, successively, two good years with his vines. He ate and drank the proceeds up, instead of husbanding his resources, and in the two following years two crétin children were born to him. Several indifferently-good years have succeeded since then, he has been obliged to live frugally, and has had several more children, all of whom are healthy. The parents are apparently free from all taint of crétinism.
  2. See Dr. Robert Christison On some of the Medico-legal Relations of the Habit of Intemperance, 1861; Dr. Edward Jarvis On the Causes of Insanity, 1851; and Reports of the Commissioners in Lunacy.