books.google.co.uk - This publication forms Part i of the Royal Commission's Inventory of the Prehistoric and Roman remains of the County of Brecknock (Brycheiniog). Part ii, Hill-Forts and Roman remains was produced in 1986. This volume covers Mesolithic, Neolithic and Bronze Age sites with all undefended and unenclosed...https://books.google.co.uk/books/about/An_Inventory_of_the_Ancient_Monuments_in.html?id=PYmPt6eMAOoC&utm_source=gb-gplus-shareAn Inventory of the Ancient Monuments in Brecknock (Brycheiniog): Later prehistoric monuments and unenclosed settlements to 1000 A.D
