The Upper Thames Valley is an important area for prehistoric monuments and has one of the highest concentrations of cursuses, distinctive linear or elongated earthworks, in Britain. In the 1980s the Oxford Archaeological Unit along with the Abingdon Area Archaeological and Historical Society had the opportunity to extensively investigate one of these sites at Drayton. This site has produced many significant results for our present understanding of the date, construction and use of cursus monuments on the lowland river gravels of Britain. This volume reports on the excavations at Drayton, and includes an account of small-scale excavations undertaken at the Lechlade cursus by OAU and Lance and Faith Vatcher. It also provides a gazetteer of known cursus monuments in the Upper Thames Valley.