I have been at some pains to show that Henry Tudor’s mercenaries were enlisted in and around Rouen, or, in other words, they came from that very district of France in which the sweat, in a somewhat modified form, began to make its appearance as an endemic malady two hundred and thirty years after. If the sweat had not become an endemic or standing disease there, as if native to the soil, or if it had become equally a disease of all other parts of Europe, as typhoid fever has, the coincidence would have been less striking, and might have been made to appear altogether irrelevant by the long interval of more than two centuries between the one event and the other. If it were a mere coincidence, we should conclude that the same causes which established in Normandy in the 18th century a steady prevalence of a sweating sickness, not unlike the more familiar prevalence of typhoid, had been at work on English soil more than two centuries earlier, not indeed to establish a form of sweating sickness steadily prevalent from year to year in one place or another, like the plague, but to induce five sharp epidemic outbursts, within a period of sixty-six years, four of which outbursts began in London and extended probably over the whole country, while one began in Shrewsbury, travelled by stages to London, and spread all over England. And, as we are ignorant of the things which determine the type of the endemic sweat of Normandy or Picardy down to the present day, we can neither deny nor affirm that there may have been corresponding factors of disease at work in the England of Henry VII. By such a line of reasoning we are brought to a view of the English sweat which precludes all farther inquiry and makes a permanent blank or maze in our knowledge. Let us try, however, whether the facts of the case do not better fall in with the view that the English sweat had a real relation to the seats of the Norman and Picardy sweat, even at a time when that sweat had not come into existence as a definite form of disease, and although the French provinces appear to have been spared the invasion of the epidemic when it overran the rest of Northern Europe in 1529.
The means of communication in 1485 was not wanting, namely the Norman soldiery of Henry VII. The tradition of their quality is preserved in the speech composed in Hall’s chronicle for Richard III. before the battle of Bosworth, and versified somewhat closely by Shakespeare: