"The value to a great Empire, such as that of , or of , of an accurate record of the available population, its resources and occupations, must always have been appreciated. We now know that from very early times (the third millenium B. C.) ample material existed for such a . Estates were carefully surveyed and the areas of the fields estimated from actual measurements, correct to the last finger-breadth. The boundaries, names of neighbours, of roads, canals, streets, or public buildings, adjoining, were exactly stated. The class of land, corn-field, vineyard, orchard, or pasture, the names of the tenants or serfs and the average yield were set down. Boundary stones engraved with the minutest details of the adjoining estate, and often bearing a short abstract of its recent history, were erected. So many of these monuments have already found their way to European Museums that it is perhaps not too much to say that were an accurate survey now made of Babylonia, with a notice of the landmarks and boundary stones still in situ, and probably easily to be recovered, we should be able to map out every town and village, road and canal, and most of the fields in that ancient centre of the world's history."