The monument includes the buried remains of a Neolithic long barrow situated 465m north-west of Dexthorpe. Aerial photographs have recorded cropmarks, indicating the below ground survival of an elongated oval enclosure defined by an infilled and buried ditch measuring about 75m long by 25m, orientated east-south-east by west-north-west. The ditch circuit is thought to be unbroken by a causeway suggesting that the remains represent a type of Lincolnshire wolds long barrow which in this case did not culminate in the construction of a mound. {1} This long barrow is situated at the head of the valley, on an upper slope, north facing, at 90m above sea level, with the long axis traversing the contours, and aligned north-north-west by south-south-east. There is an elongated elliptical chalk mark bounded by the dark line of the surrounding ditch. There are no apparent gaps in the ditch. The Spellow Hills long barrow lies on the opposite side of the valley, 450m to the north. Lines of levelled ridge and furrow cultivation extend across the field. {3}