3/. The Survey Course - University College London

precipitation the long dry valleys carry water southwards into the Lavant. The scarp
ridge represents the watershed in this area; drainage from here is to the north into the
catchment of the River Rother. Springs rise from the base of the Chalk, such as
Coster’s Brook at Cocking and those to the east around Sutton and West Burton, at
the eastern end of the Singleton Anticline (Fig. 4). Further springs emerge on the
Gault Formation and form the SE-NE trending shallow valleys that are cut into the
Folkestone and Sandgate Formations. The monuments are located on a ridge of high
ground: Heyshott Down, between Manor Farm Down to the west and Graffham Down
to the east. They sit in a slight col between two high points at 233m OD; the ground
immediately in the vicinity of the barrows rises from c. 225m at the westernmost
barrow to c. 230m OD at the easternmost. The ground the barrows occupy is the
highest section on the ridge between the Cocking Gap and the River Arun, the only
higher ground is the hill at Crown Tegleaze, set back from the ridge above
Upwaltham, which can be clearly seen in Figure 6.
Fig. 8. Aerial photograph showing the site, the white track is the South Downs way.
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