The Neolithic round barrow at Duggleby Howe comprises a substantial mound surrounded by a large causewayed ditch. The mound covers a rich Middle Neolithic burial sequence, as revealed by Mortimer's nineteenth-century excavations, and occupies a position on the northern valley side of the Gypsey Race, near to the stream's source. Following the recent radiocarbon dating of the burial sequence and primary mound building, a small research excavation was undertaken across the ditch of the large, penannular causewayed enclosure that surrounds the mound primarily in order to obtain artefactual and ecofactual material from which to construct a relative and absolute chronology for the ditch sequence(s).
INTRODUCTIONDuggleby Howe (SE 880669) is one of the most iconic monuments of the British Neolithic and comprises a substantial round mound surrounded by a large causewayed ditch (Illus. 1). The mound covers a rich Middle Neolithic burial sequence, as revealed by Mortimer's nineteenth-century excavations (Mortimer 1905), and occupies a position on the northern valley side of the upper Gypsey Race, near to the stream's source. The site has been reinterpreted on a number of occasions, most notably by Kinnes et al. (1983) and Loveday (2002), but both reconsiderations lacked an absolute chronology for either the mound sequence or its surrounding ditch. Following the dating of the burial sequence and primary mound building at Duggleby Howe (Gibson and Bayliss 2009), a small research excavation was undertaken across the ditch of the large, penannular causewayed enclosure that surrounds the mound in order to obtain artefactual and ecofactual material from which to construct a relative and absolute chronology for the ditch sequence(s). It was also designed to test the relationship of the causewayed ditch (Illus. 2, a) to other features and in particular a large circular pit (Illus. 2, b) on the inside of the causewayed ditch and a smaller linear ditch (Illus 2, c) which followed its outside edge. In collaboration with colleagues from the University of Vienna, Institute of Archaeological Sciences (VIAS), the excavation was also designed to test the suitability of laser-scanning recording within an excavation environment. The excavation lasted six weeks and was generously funded by English Heritage and the University of Bradford.
PRELIMINARY SURVEYIn order to locate the trench exactly, non-invasive topographical laser-scanning, magnetometry and ground penetrating radar surveys were undertaken over the northern section of the field (Illus 3-5). This survey was undertaken by Dr Wolfgang Neubauer and his team from VIAS, and a detailed methodology is presented in the project archive.The combined results of the geophysical surveys were used to precisely locate the excavation trench to within 0.04 m in the national grid. It was also possible to pinpoint the features chosen for excavation and outlined above. The GPR (Illus. 5) and gradiometer (Illus. 6) surveys added detail to the aerial photographs and seemed to suggest that the main cause...