Chapter IX

SMALLPOX AND MEASLES.

With our modern habit of seeking out the matter of fact, of going back to the reality and of reconstructing the theory, it is not easy for us to understand how completely the medieval world of medicine was enslaved to authority and tradition even in matters that were directly under their eyes. It was thought a great thing that Linacre, of Oxford, in the first years of the 16th century, and Caius, of Cambridge, some fifty years later, should have gone back to Galen for their authority, passing over the Arabians who had been the interpreters of classical medicine all through the Middle Ages. Their editions of forgotten medical works of the Graeco-Roman school were a step forward in scholarship, and they opened the way to the first-hand observations of disease which really began some hundred years after with the writings of Willis, Sydenham and Morton. But smallpox and measles were not Galenist themes, they were peculiarly Arabian; and the very moderate share that England took in the medical Revival of Learning made no difference to the paragraphs or chapters on those diseases that were circulating in the medieval compends. While the Arabian or Arabistic writers of Spain, of Salerno, and of Montpellier were the depositaries and interpreters of the Galenic teaching, they were also the first-hand authorities upon some matters of specially Arabian experience, of which smallpox and measles were the chief. Whatever was said of those two epidemic maladies abroad, in the systematic works of Gordonio and Gilbert, and in the later compilation of Gaddesden in England, was not only of Arabian origin, but it was all that was known of them. Rhazes, the original Arabic writer on smallpox and measles about the beginning of the 11th century, supplied both the doctrine and the experience. His observations and reasonings, altered or added to by his later countrymen, passed bodily into the medical text-books of all Europe. The interest in the treatise of Rhazes was so great that it was printed in 1766 by Channing, of Oxford, in Arabic with a Latin translation, and in an English translation from the original by Greenhill, of Oxford, in 1847.

In the literature we took over smallpox from the Arabians; but had we no native experiences of the disease itself, and, if so, when did it first appear in this country? One can hardly attempt an answer to these questions even now without stirring up prejudice and embittered memories. It has been the fate of smallpox, as an epidemological subject, to be invested with bigotry and intolerance. Whoever has maintained that it is not as old as creation has been suspected in his motives; anyone who shows himself inclined to put limits to its historical duration and its former extent in Britain is clearly seeking to belittle the advantages that have been derived during the present century from vaccination.

The wish to establish the antiquity of the smallpox in Europe has been as strong as the wish to overthrow the antiquity of the great pox. While undoubted traces of the latter in early times have been covered over with the generic name of leprosy, the vaguest reference to “pustules” or spots on the skin have been turned by verbalist ingenuity to mean devastating epidemics of smallpox. I am here concerned only with Britain, and must pass over the much-debated reference by Gregory of Tours to epidemics in the 6th century, the period of the Justinian plague. But in England the epidemic which stands nearest in our annals to the great plague of the 6th century, the widespread infection described by Beda as having begun in 664 and as having continued in monasteries and elsewhere for years after, has been claimed by Willan as an epidemic of smallpox. Willan, with all his erudition, was a dermatologist, and acted on the maxim that there is nothing like leather. His contention in favour of smallpox has been referred to in the first chapter, dealing with the plague described by Beda, and need not farther concern us. It is not in England that we find evidence of smallpox in those remote times but in Arabia.