After such an instance as the Leyden fever of 1669, nothing is incredible in the records of fever subsequent to the extinction of plague. Turning to Sydenham’s account of the continued fever which occurred in London during the same season, the latter half of 1669, as well as in the three years following, we find that it was characterized rarely by diarrhoea or sweats, commonly by pain in the head, by a moist white tongue which afterwards became covered by a dense skin, and by a greater tendency than Sydenham had ever seen to aphthae (the “thrush in the mouth” of Admiral Teddiman in 1668) when death threatened--the same being a “deposition from the blood of foul and acrid matter upon the mouth and throat.” But London in 1668 and 1669 suffered little from fevers in comparison to Leyden, Haarlem and other Dutch towns, its high mortality in the summer and autumn of 1669 being from infantile diarrhoea, cholera nostras and dysentery. Sydenham’s continued fever from 1673 to 1676 (he was absent from his practice in 1677 owing to ill health) was a malady which affected adults as well as children, but, it would appear, the latter especially. The only characteristic case given is of a boy of nine who did not begin to mend until the thirtieth day. Many recovered in a fortnight, while others were not clear of the fever in a month. On account of the remarkable stupor which almost always attended it, Sydenham called the fever of this constitution a comatose fever. It began with sharp pains in the head and back, pains in the limbs, heats and chills, etc. His account of the comatose state is exactly like that given by Willis for the fever of children in 1661--profound stupor, sometimes for a week long, so profound in some as to pass into absolute aphonia (the “acute fever with dumbness” of later writers), while others would talk a few words in their sleep, or would seem to be angry or perturbed by something (the chimaeras mentioned by Willis) and would then become tranquil again; when roused to take physic or to drink they would open the eyes for a moment and then fall back into stupor. When they began to mend, they would crave for absurd things to eat or drink. During convalescence the head, through weakness, could not be kept straight but would incline first to one side and then to the other[28].