Title page from "Reflections on the weekly bills of mortality for the cities of London and Westminster, and the places adjacent : but more especially, so far as it relates to the plague and other most mortal diseases that we English-men are most subject to, and should be most careful against, in this our age". Published in London, 1665, and attributed to John Graunt (1620-1674). Fully digitized version of book: HEW 11.11.1, Houghton Library, Harvard University