'Offa's Dyke crossing a hill top, in Denbighshire', Wales, 1935. View of the large linear earthwork, known as Offa's Dyke, which roughly follows the current border between England and Wales. Offa, the Anglo-Saxon king of Mercia from 757 until 796 AD, is traditionally believed to have ordered its construction. From A History of the Anglo-Saxons, Vol. II, by R. H. Hodgkin. [The Clarendon Press, Oxford, 1935]