Information about Lewes becomes much more plentiful from the reign of Alfred the Great onward, as it was one of the towns which he fortified as part of the network of "burhs" he established in response to the Viking raids. The peace and stability brought by Alfred and his successors evidently stimulated economic activity in the area, for in the late Anglo-Saxon period Lewes seems to have been a thriving boom town - during the reign of Alfred's grandson Æthelstan it was assigned two royal moneyers, more than any other mint in Sussex, and according to Domesday Book it generated £26 of revenue for the crown in 1065, almost twice the amount of any other town in the county.