I. _Robert Wilson_, of the Second Regiment of Foot Guards, on the 19th of _February_ 1761, was seized with a Shivering and Coldness, succeeded with Heat, Thirst, a short dry Cough, Difficulty of Breathing, Head-ach, and slight Stitches in his Breast; some Blood was taken away, which was sizy, and he was ordered two Ounces of the _Sperma Ceti_ Mixture, with the _spiritus mindereri_, every two or three Hours. He continued without any manifest Alteration in the Symptoms, till the 21st, when a Number of dun Petechiæ appeared all over his Body, particularly on his Breast. The Stitches and Cough were then much easier, and he had his Medicines as before. On the 22d, he was seized with a Delirium, and was somewhat comatose; when he was ordered a Drachm of the Bark every six Hours. The 23d, the comatose Symptoms had increased, and he had slight Twitchings of the Tendons, a dry brown-coloured Tongue, and a Faultering in his Speech. The Bark was continued, with the Addition of two Spoonfuls of Mountain Wine every two Hours. On the 24th, he had several loose Stools. The 25th, he was still loose, and went on as before, with the Addition of six Grains of the _Pilulæ saponaceæ_ in the Evening. The 26th, the Petechiæ were not so apparent as before, but he had still the nervous Symptoms, and his Breathing grew more difficult; and therefore a Blister was applied between his Shoulders, and his Medicines continued; as they were likewise on the 27th, without any Alteration in the Symptoms. On the 28th, his Tongue became moister, and the Pulse, which had been low and quick the four preceding Days, became fuller and slower. On the 29th, he was much more sensible, his Tongue more moist, and the Twitchings of the Tendons much less; and in the Evening he fell into a profuse Sweat, which lasted all the 30th. On the 1st of _March_, his feverish Symptoms were much abated, his Pulse was calmer, his Skin moist, his Drought less, and his Urine dropt a plentiful Sediment. On the 2d, his Fever was almost entirely gone, but he had still a Cough, and spit up a viscid Matter. He was ordered to go on as before, with the Addition of two Spoonfuls of the _Sperma Ceti_ Mixture, and the _Spiritus Mindereri_, when his Cough was troublesome. He followed this Course till the 7th, when, his Cough and Fever being gone, he was ordered a Dose of Tincture of Rhubarb; after which he recruited his Strength daily, without the Assistance of any more Medicines.