The March of Ewyas: The Story of Longtown Castle and the de Lacy Dynasty by Martin CookThe March of Ewyas begins with the story of a community archaeology project that set out to answer the mystery of why a parish on the Welsh border apparently had two castles. Over a two year period, a group of volunteers and professional archaeologists excavated at both castle sites. In the process, evidence for a previously undocumented Roman fort was discovered, many of the conclusions reached by previous historians were overturned and fresh