infectant and pestilential to their own kind.” But even if these truths had been generally apprehended, religious prescription and usage would have been too strong to allow of radical measures being adopted. The grand provocative of plague was no obvious nuisance above ground, but the loading of the soil, generation after generation, with an immense quantity of cadaveric matters, which were diffused in the pores of the ground under the feet of the living, to rise in emanations, more deadly in one season than in another, according as the level of the ground-water and the heat of the earth determined the degree of oxidation, or the formation of the more dangerous half-way products of decomposition. So little is known of the great plagues of London in 1406-7, 1464, 1479, 1500, and 1513, that we can only conjecture how the dead, to the number perhaps of one hundred in a day at the height of the epidemic, were disposed of--probably in trenches in the fields of Whitechapel, Smithfield and Finsbury, or in such parishes as St Sepulchre’s. The skirts of the city were used also to deposit the soil upon. Thus it happened that the ground outside the walls, which came in time to be the densely populated liberties and out-parishes, and the chief seat of all later plagues, had for generations before received the refuse of the city and a large proportion of the bodies of the dead. An instance mentioned by Stow, in 1598, may be taken as standing for many more: “On the right hand, beyond Shoreditch Church toward Hackney, are some late-built houses upon the common soil; for it was a lay-stall.” What remains to be said of localities and circumstances of plague in London will come in with the history of successive epidemics, which we may now resume and carry to the end of the Tudor period. Chronology of Plague, 1564-1592. The amount of plague in London for the two or three years next following the great epidemic in the autumn of 1563 is accurately known from Stow’s abstracts of the weekly bills of mortality. It was exceedingly little, the deaths being but one or two or three in a week, and often none. The figures come to an end with July, 1566, and it is probable that the bills may not have been made for a time after that. The proposal made by Sir Roger Martyn in a letter of 20th October, 1568, to the earl of Northumberland, that all strangers arriving from over sea should be quarantined at Gravesend, would have been instigated by the known prevalence of plague and other malignant types of sickness in Scotland and at various parts of the continent of Europe. It was just in those years, before and after the founding of the Royal Exchange in 1566, that the concourse of merchants to London, especially from the war-troubled Low Countries and France, was greatest.