In the year 548 the kingdom of Ts'u ordered a cadastral survey, and also a general stock-taking of arms, chariots, and horses. Records were made of the extent and value of the land in each parish, the extent of the mountains and forests, and the resources they might furnish. Observation was also made of lakes and marshes suitable for sport, and it was forbidden to fill these in. Note was taken of such hills and mounds as might be available for tombs--a detail which shows that modern graves in China differ little if at all from the ancient ones; in fact in Canton "my hill," or "mountain," is synonymous with "my cemetery." In order to fix the taxes at a just figure, stock was taken of the salt- flats, the unproductive lands, and the tracts liable to periodical inundation. Areas rescued from the waters were protected by dykes, and subdivided for allotment by sloping banks, but without introducing the rigid nine-square system. Good lands, however, were divided according to the method introduced by the Chou dynasty; that is to say, six feet formed a "fathom," 100 fathoms an "acre," 100 "acres" the allotment of one family; these English terms are, of course, only approximately correct. Nine families still formed a hamlet or "well," and they cultivated together 1000 "acres," the central hundred going to pay the imposts. Taxes, direct and indirect, were fixed with exactitude, and also the number of war-chariots that each parish had to furnish; the number of horses; their value, age, and colour; the number of armoured troopers and foot soldiers, with a return of their cuirasses and shields. Regarding this colour classification, of the horses, it may be mentioned that the Tartars, in the second century B.C., were in the habit of equipping whole regiments of cavalry on mounts of the same colour, and it is, therefore, possible that this practice may have been imitated in South China; but Ts'u never once herself engaged in warfare with the Tartars; at all events with Tartars other than Tartars brought into Chinese settlements.