It has been conjectured that population in the country at large speedily righted itself, according to the principle that population always tends to come close to the limit of subsistence. But there is reason to think that the means of subsistence were themselves reduced. We read of corn-land running to waste, although most of the references to desolation are perhaps to be taken as true for only one or two harvests following the plague. Again, it is undoubted that sheep-farming and the pasturing of cattle at length took the place of much of the old agriculture. It is not easy to make out when the change begins; but there are instances of rural depopulation as early as 1414[380], and the same had become a burning grievance in the time of cardinal Morton and the early years of sir Thomas More. It has been assumed, also, that the “positive checks” to population had been taken off, when they ought in theory so to have been: that is to say, after the inhabitants had been enormously thinned. The statement of Hecker, that there was increased fecundity after the pestilence, appears to be an instance of that author’s _a priori_ habit of mind[381]. What we read in an English chronicle of the time is just the opposite, namely, that “the women who survived remained for the most part barren during several years[382].” The authority is not conclusive, but the statement is in keeping with what we may gather from Langland’s poem as to ill-assorted and sterile marriages, and as to illicit unions, which, as Malthus teaches, are comparatively unfruitful. The alleged sterility is also in keeping with, although not strictly parallel to, the experience of crowded Indian provinces, such as Orissa, where a thinning of the population by famine and disease has been statistically proved to be followed by a marked decrease of fecundity. More direct evidence of a permanent loss of people occurs a generation after the Black Death, at a time when the circumstances of health were such as would explain it. The poll-tax of 1377 was a means of estimating the population. The tax was levied on every person, male or female, above the age of fourteen. In estimating the population from the poll-tax returns, it is usual to add one-fifth for taxable subjects who had evaded it, and to reckon the taxable subjects above fourteen years as two-thirds of the whole population. On that basis of reckoning, the population of the whole of England, except Cheshire and Durham, in the year 1377 would have been 2,580,828 (or 1,376,442 who actually paid their groat each). The population of the principal towns is calculated, in the second column of the Table, from the numbers in the first column who actually paid the poll-tax, according to the Subsidy Roll of 51 Edward III. Laity assessed for the Poll-tax of 1377 in each of the following Towns, being persons of either sex above the age of fourteen years.