The logical position of relapsing fever was completed by Dr Seaton Reid, of Belfast, when he proposed, in his account of the epidemic in 1846-7, to call it Relapsing Synocha[330]. Other fevers have shown a tendency to relapse in certain circumstances. Three fevers which have many points in common, the sweating sickness, dengue and influenza, are all subject to relapses. It was doubtless of the sweating sickness that Sir Thomas More was thinking when he wrote: “Considering there is, as physicians say, and as we also find, double the peril in the relapse that was in the first sickness.” Plague, also, might relapse, or recur in an individual once, twice, three times, or oftener in the same epidemic season. Enteric is an instance of a long-period fever which has at times a tendency to relapses[331]. None of these, however, can dispute the claim of relapsing synocha to be relapsing fever _par excellence_. For whatever reason, the short-period fever of times of distress and dearth or famine has shown a peculiar tendency to relapse, and has shown that tendency more in the 19th century than in the 18th, and more among the Irish and Scotch poor than among the English. The practical question that came to the front in the epidemic fever of 1817-19 was that of isolation hospitals for the sick. It was thus stated by Dr Millar, of Glasgow, in a letter of advice to the authorities of Aberdeen: “It is only by a universal, or nearly universal sweep of the sick into Fever Hospitals, joined to a universal or nearly universal purification of their dwellings, that anything is to be hoped for in the way of suppressing our epidemic. So far as this grand object is concerned, all the rest is folly: it is worse than folly[332].”