It is not easy to make out what the differences of “type” described by Sydenham depended on; but it may be hazarded that those who fell into smallpox in an otherwise unhealthy season would die in larger numbers, being weakened by antecedent disease, such as measles or epidemic diarrhoea, influenza or typhus fever. An epidemic of measles in the first six months of 1674 was most probably the reason of the great fatality of smallpox in the second half of that year (see the chapter on Measles). The high figures of smallpox mortality in 1681 followed two hot summers, unhealthy with infantile diarrhoea, and coincided with a third season unhealthy in the same way. The deaths by smallpox in the last week of August, 1681, reached the very high figure of 168, the next highest cause of death that week, and the highest the week after, being “griping in the guts,” or infantile diarrhoea. The smallpox of 1685 was more uniformly distributed over the months of the year, which was one of malignant typhus, the worst week for fever having 114 deaths (ending 29 Sept.), and the worst week for smallpox 99 deaths (ending 18 Aug.).
The deaths by smallpox in the London bills are the only 17th century figures of the disease. According to later experience, a high mortality in London in a certain year meant an epidemic general in England in that or the following year; and the same appears to have held good for the period following the Restoration. In the parish register of Taunton, a weaving town, the smallpox deaths are many in 1658 (“all the year,” which was one of agues and influenza), in 1670, 1677, and 1684 (“very mortal,” the year being noted for a very hot summer and for fevers and dysenteries[853]). The highest total of deaths in London to the end of the 17th century fell in 1681, which is known to have been a year of very fatal smallpox at Norwich[854] and at Halifax. Thoresby’s friend Heywood lost three children by it at the latter town in the epidemic of 1681, which does not appear to have visited Leeds. In 1689 Thoresby himself lost his two children at Leeds within a few days. In 1699 the epidemic returned, and he again lost two of the four children that had been born to him in the interval[855]. Similar calamities befell country houses, of which the following from the correspondence of a titled family in Cumberland is an instance:
“17th April, 1688,—Captaine Kirkby came hither, and told me that Mrs Skelton, my god-daughter, of Braithwaite, dyed the last week, and her two children, of the smallpockes[856].”
Rumours of “smallpox and other infectious disease” at Cambridge in the summer of 1674[857], and at Bath in the summer of 1675[858], threatened to interfere with the studies of the one place and the gaieties of the other.
Smallpox in London in 1694: the death of the Queen.
The epidemic of smallpox in London in 1694 was made memorable by the death of the queen. On 22 November Evelyn notes, “a very sickly time, especially the smallpox, of which divers considerable persons died”; on 29 December: “the smallpox increased exceedingly, and was very mortal,” the queen having died of it the day before. Queen Mary came of a stock to which smallpox had been peculiarly fatal, a brother and sister of her father, James II., having died of it at Whitehall in 1660. Some of the particulars of her illness and death come from bishop Burnet[859], who saw her in the first days of the attack and was about the Court until the end of it; the authentic medical details are by Dr Walter Harris, one of the physicians in attendance, who published them, by leave of his superiors, in order to meet the censures passed on the doctors “by learned men at a great distance[860].”
The symptoms of illness on the first day did not prevent the queen from going abroad; but, as she was still out of sorts at bedtime, she took a large dose of Venice treacle, a powerful diaphoretic which her former physician, the famous physiologist Dr Lower, had recommended her to take as often as she found herself inclined to a fever[861]. Finding no sweat to appear as usual, she took next morning a double quantity of it, but again without inducing the usual effect of perspiration. Up to that time she had not asked advice of the physicians. To this severe dosing with one of the most powerful alexipharmac or heating medicines, the malignant type of the ensuing smallpox was mainly ascribed by Harris, who was a follower of Sydenham and a partizan of the cooling regimen. On the third day from the initial symptoms the eruption appeared, with a very troublesome cough; the eruption came out in such a manner that the physicians were very doubtful whether it would prove to be smallpox or measles. On the fourth day the smallpox showed itself in the face and the rest of the body “under its proper and distinct form.” But on the sixth day, in the morning, the variolous pustules were changed all over her breast into the large red spots “of the measles”; and the erysipelas, or rose, swelled her whole face, the former pustules giving place to it. That evening many livid round petechiae appeared on the forehead above the eyebrows, and on the temples, which Harris says he had foretold in the morning. One physician said these were not petechiae, but sphacelated spots; but next morning a surgeon proved by his lancet that they contained blood. During the night following the sixth day, Dr Harris sat up with the patient, and observed that she had great difficulty of breathing, followed soon after by a copious spitting of blood. On the seventh day the spitting of blood was succeeded by blood in the urine. On the eighth day the pustules on the limbs, which had kept the normal variolous character longest, lost their fulness, and changed into round spots of deep red or scarlet colour, smooth and level with the skin, like the stigmata of the plague. Harris observed about the region of the heart one large pustule filled with matter, having a broad scarlet circle round it like a burning coal, under which a great deal of extravasated blood was found when the body was examined after death. Towards the end, the queen slumbered sometimes, but said she was not refreshed thereby. At last she lay silent for some hours; and some words that came from her shewed, says Burnet, that her thoughts had begun to break. She died on the 28th of December, at one in the morning, in the ninth day of her illness.
The case of Queen Mary was one of discrete smallpox turning to the haemorrhagic form; and it had from first to last the most striking resemblance to that of her uncle, the Duke of Gloucester, in September, 1660[862]. The smallpox, says Burnet, came out, but the pustules “sunk so that there was no hope of raising them”; and in sinking they turned to livid spots or blotches. It is quite possible that the repeated doses of Venice treacle at the outset, which failed in their usual effect of inducing sweat, may have had something to do with the result, as Dr Harris certainly believed and afterwards publicly said with the leave of his superiors. But the queen, with eminent qualities of mind and heart, was not physically of good constitution. She was one of those children of James II. whom Willis had brusquely pronounced, some twenty-five years before, to be affected with mala stamina vitae; and her father’s brother, the Duke of Gloucester, who was not treated in the same way, and, by one account, not treated at all, died in exactly the same kind of haemorrhagic smallpox[863].