It was from 1830 to 1834 that a change in the reigning type of fever began to be remarked in London, Dublin, Edinburgh and Glasgow, the new type becoming more and more evident as fevers became more prevalent in the ‘thirties’ and ‘forties.’ Typhus at length became so much a spotted fever that the question arose whether it should not be classed among the exanthemata. In 1840, Dr Charles West, having observed “the alteration in character which fever has undergone within the last few years,” went over the history (but more the foreign than the English) with a view “to illustrate the question whether typhus ought not to be classed among the exanthematous fevers[357]:” of course he found many old descriptions of a mottled rash or other spots, but saw no reason to make spotted typhus one of the exanthemata. Dr Kilgour, of Aberdeen, who treated more than a thousand cases in his fever-ward at the infirmary there from 1838 to 1840, wrote in 1841, “I am perfectly satisfied that this fever, call it by what name we will, is truly an exanthematous fever[358].” Previous to 1835, the spots of fever-cases in the Glasgow Infirmary had hardly been remarked; but after that date all cases were classed either as spotted or not, the spotted cases being three-fourths of the whole. Besides being spotted, the fever of the new constitution was insidious in its approach and low in its reaction, very unlike the sthenic, militant, inflammatory synocha of the generation before. The blood-letting which had been all but universally used in the fever from 1816 to 1828, and had seemed to answer well, was continued for a time in the fever of the ‘thirties.’ But it was soon found to be injurious: the patients in the new fever were apt to faint when only a few ounces of blood (four or six) had been drawn, whereas in the other fever (whether relapsing or simple continued) they had often lost thirty ounces before deliquium was reached. It was found, on the other hand, that fever-cases in the ‘thirties’ needed wine and other cordial regimen. There was nothing new in these revolutions, whether of the fevers themselves, or of the opinions as to their treatment. Sydenham’s method of taking his cue for treatment from the “constitution” of the season, which was the method of Hippocrates, appeared to be once more the best suited to the circumstances.