There were higher figures in the years immediately before 1771, the years to which the generalities of Fordyce and Armstrong relate. There is a decline in the fever-mortality towards the end of the century; but it is just from the years 1799-1800 that we have an account by Willan of the prevalence and conditions of London typhus, than which nothing can well be imagined worse. The intermediate glimpses we get of typhus in London in the writings of Dr Hunter, physician, and of Dr James Sims, show that the disease was perennial. “In the month of February, 1779,” says Hunter[245], “I met with two examples of fever in the lodgings of some poor people whom I visited that resembled in their symptoms the distemper which is called the jail or hospital fever. It appeared singular that this disease should show itself after three months of cold weather. Being therefore desirous of learning the circumstances upon which this depended I neglected no opportunity of attending to similar cases. I soon found a sufficient number of them for the purpose of further information. It appeared that the fever began in all in the same way and originated from the same causes. A poor family, consisting of the husband, the wife, and one or more children, were lodged in a small apartment not exceeding twelve or fourteen feet in length, and as much in breadth. The support of them depended on the industry and daily labour of the husband, who with difficulty could earn enough to purchase food necessary for their existence, without being able to provide sufficient clothing or fuel against the inclemencies of the season. In order therefore to defend themselves against the cold of the winter, their small apartment was closely shut up, and the air excluded by every possible means. They did not remain long in this situation before the air became so vitiated as to affect their health and produce a fever in some one of the miserable family. The fever was not violent at first, but generally crept on gradually ... soon after the first a second was seized with the fever, and in a few days more the whole family perhaps were attacked, one after another, with the same distemper. I have oftener than once seen four of a family ill at one time and sometimes all lying on the same bed. The fever appeared sooner or later as the winter was more or less inclement, as the family was greater or smaller, as they were worse or better provided with clothes for their persons and beds, and with fuel, and as their apartment was more or less confined. The slow approach of the fever, the great loss of strength, the quickness of the pulse with little hardness or fulness, the tremors of the hands, and the petechiae or brown spots upon the skin, to which may be added the infectious nature of the distemper, left no doubt of its being the same with what is