Along the narrow belt of Upper Chalk that forms the northern margin of the Vale of Ham (or Shalbourne), a sunken and picturesque lane passes from the village of Inkpen in a direct line to Shalbourne. At a distance of about a quarter of a mile west of the cross-roads in the village (and about the same north-west of the church), the 500 ft. contour crosses this road. On the new series Survey map (Sheet 267) a quarry is marked on the northern side of the road near this point, and a northerly dip of 25° is recorded. The quarry is now almost completely grassed over, but about 100 yards to the east of it (practically on the line of the shaft of the arrow on the map) there is an open road-cutting, giving access to the Chalk, on both sides of the road.