This great epidemic was mainly one of relapsing fever. The patient “got the cool,” or passed the crisis of the fever, usually on the evening of the fifth or seventh day, sometimes on the ninth, the evening exacerbation, which was to prove critical, being ushered in generally with a rigor, and passing off in profuse perspiration throughout the night. The five-day fever was more certain to relapse than that of seven days, the seven-day fever was more likely to relapse than that of nine days. The relapses might be one or two or three or more, prolonging the illness for weeks. The clear interval varied from twenty-four hours to fourteen days. There were some cases with jaundice which led Stokes and Graves to speak loosely of “yellow fever[484].” O’Brien saw only four cases with exquisite icterus in fifteen hundred cases of relapsing fever. There was a small proportion of cases of ordinary typhus of a severe kind, marked by unusual delirium or phrensy and the absence of sordes on the teeth or petechiae on the skin; the typhus cases became more numerous in the winter season, or, in other words, the original attack lasted to nine, eleven, or thirteen days, with little or no tendency to relapse. Gangrene was not uncommon in one part of the body or another, and in four cases the feet became gangrenous[485]. Even with the admixture of pure typhus cases, and with dysenteric complications in the autumn and winter, the mortality of the whole epidemic was small--not more than it would have been among a third part the number of fever cases in an ordinary year. At the Cork Street Hospital alone (including the tents) there were 8453 admissions from 4th August, 1826, to 4th April, 1827, with 332 deaths, or four deaths in a hundred cases. The proportion of recoveries was quite as remarkable in known instances in the squalid homes of the poor, where two or three would be found ill of fever on one pallet, or a father and six children in one room, shunned by the neighbours.