Exactly what caused the economic decline between 1300 and 1348 and how far, if at all, it was reflected in a reduction of the population has been the subject of much debate. Dr Titow has cited evidence from the Winchester Account Rolls to show that the great famines of 1315 to 1317 were the turning point.{403} Though, in some areas, the recession seems to have begun ten years or more before, in general the statement seems valid. The famines themselves cost many lives but, in the palmier days of the thirteenth century, this loss would quickly have been made good. In the fourteenth century no such recovery took place. In a highly important article Professor Postan has demonstrated that, while wages rose gradually and taxation did not decline, there was a fall in agricultural output and in exports.{404} The explanation must be a smaller force of labourers to share the pay packet. There is evidence to the same effect to be found in the narrowing wage-differential between skilled and unskilled labour and the withdrawal from previously cultivated land. ‘The contemporaries obviously believed that they were living in an age of contracting settlement,’ commented Postan, ‘and there is no reason why we should not accept their belief at its face value.’
The population in 1348 was, therefore, certainly little greater and probably less than it had been in 1310. But this does not tell one how large it was. Seebohm was the first historian to grapple with the problem in anything approaching modern terms.{405} He visualized 1348 as a peak, attributed the rapid rise in the preceding century largely to the immigration of fishermen and manufacturers of woollen cloth, and concluded that the population just before the Black Death was in the region of five million. Thorold Rogers promptly countered with the contention that England could not possibly have supported a population of five million.{406} He analysed the farm accounts of 8,000 bailiffs and deduced from the production figures that the population of England and Wales together must have been somewhere between two and two and a half million. After a delay for cogitation Seebohm replied challenging Rogers’s figures for corn production.{407} The wrangle was there allowed to rest. For the next seventy-five years population estimates varied between these two points, usually inclining towards the higher.
In 1948, Professor Russell for the first time brought highly sophisticated statistical techniques to bear on the problem. His conclusion was that the English population in 1348 was some 40 per cent larger than at the time of the poll-tax, in round figures about 3.7 million.{408} His graphs and tables are awe-inspiring but behind his arcane statistical manoeuvres the validity of his conclusion rests to a great extent on the gratifyingly comprehensible assumption that the average medieval household contained only 3.5 members and not five as had previously been assumed. The significance of this figure lay in the ratio which it established between land-holders, whose deaths were recorded, and the rest who usually died unchronicled. If his index figure were to be raised by even half a person per household, the total population would certainly be increased to well over four million. An accurate index figure must therefore be fundamental to any calculation.
Professor Russell justified his somewhat dramatic departure from accepted theory by evidence drawn from inquests of enclosures, poll tax lists and other sources.{409} This is far from being unchallenged. The counter-argument, in its simplest form, was that the Russell household unit contained only the nucleus of parents and children. But there is good reason to include other members, such as a retired father, unmarried brothers or sisters, servants and sometimes even sub-tenants.{410} Roger Tyler’s household included seven people in addition to the tenant himself – a large unit, certainly, but by no means improbably so. Professor Russell’s calculations, it is claimed, were based on an extremely limited number of cases and his evidence drawn largely from the period which followed the plague. If the 3.5 index were applied to the figures established for 1311 then, Dr Titow has pointed out, it would ‘postulate a society in which male persons over twelve years of age constituted 59 per cent of the total population’.{411} Undoubtedly there is considerable variation between one period and another but Dr Krause, who analysed Professor Russell’s calculations with thoughtful distaste, cannot accept that in the fourteenth century the index fluctuated more than between 4.3 in a period of low childbirth and 5.2 when the rate was high.{412}
Faced with statistical juggling of this kind the layman is apt to feel a sense of baffled helplessness, leading often to blind acceptance of the latest theory which happens to have been propounded. He would do well to remember Professor Elton’s expression of lapidary wisdom:
