XX.— On Offa's Dyke

There are few points in ancient history more interesting than an inquiry into the age and object of the great “dykes”; such as those of north Wiltshire, between central and southern England; those north of Cambridge, which bar the only access into East Anglia from the south; those which run from the estuary of the Dee to that of the Severn, cutting off the whole of Wales; or the great earthwork nearly parallel to the Roman wall which crossed the island from the Solway to the Tyne

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