exhausted and the agricultural carrying capacity of the land was exceeded several times over the course of six millennia. Much of the area therefore remained wooded from the Middle Ages until World War II. Analysis of remains found in some of the Bronze Age burial mounds, by experts at Bournemouth University, has revealed that many of the bones had small holes drilled in then, enabling them, it is hypothesised, to have been articulated by means of wooden pegs, i.e. the skeletons were prevented from falling apart during repeated removal and re-burial. There are many Neolithic and Bronze Age monuments, including the henge monuments at Knowlton and the remains of a number of Iron Age settlements on the downs, most notably the hill fort at Badbury Rings (Vindocladia). There is a Roman villa which has been dug by archaeological television programme Time Team. During the Saxon invasion of England the Romano-British kept the invaders out of Dorset by building Bokerley Dyke, a defensive ditch, across the Roman Road that runs across the downs from Dorchester to Old Sarum. The downs have been sparsely populated since Saxon times, largely preserving archaeology until World War II when the need for agricultural land outweighed the archaeological importance. It was here that Augustus Pitt Rivers developed modern archaeological field work in the 19th century. The downs are named after the village Cranborne, founded by the Saxons, which had a manor house and a small monastery. The word "chase" comes from the hunts, frequented by royalty (including Kings John, Henry VIII and James I), which took place on the downs. The first known owner of the chase is thought to have been Brictric. His possessions were confiscated by Queen Matilda, wife of William the Conqueror; on her death, it passed to the Crown, and was granted, with other lands forming the feudal barony of Gloucester, to Robert Fitzhamon in 1083. This passed to his son-in-law Robert, 1st Earl of Gloucester. Ownership of the chase passed through successive Earls of Gloucester until the death of Gilbert de Clare, 8th Earl of Gloucester in 1314. The chase passed to his sister Elizabeth de Clare (d. 1360), and thence to her granddaughter Elizabeth de Burgh, 4th Countess of Ulster (d. 1363). The Countess was succeeded by her daughter Philippa, 5th Countess of Ulster (d. 1382), wife of Edmund Mortimer, 3rd Earl of March. The chase was owned by successive