A good picture of the county in 1086 is given by Domesday Book, though there is some difficulty in identifying the various places since the hundreds are not specified. The total population given for the county, which had different boundaries to those today, was 13,399, however this only included the heads of households, so with their families this may have been around 67,000. Farming seems to have prospered for the next three centuries but was severely hit by the Black Death which in 1348 arrived in Dorset and quickly spread through Somerset, causing widespread mortality, perhaps as much as 50% in places. It re-occurred, resulting in a change in feudal practices since the manpower was no longer so available.