ON the western edge of the rising ground, a portion of  which is the wild heath known as Chislehurst Common, the chalk, overcapped with "Thanet sands " and gravelly drift, forms an escarpment, produced by the separation of the chalk rock; the sunken portion of the chalk forms the contour of the valley which passes through Sundridge Park, Bromley, towards Lee. Along this valley flows occasionally a small stream, gathered from the watershed of the long winding line of declivities above.
   The chalk escarpment may be traced at the foot of the woods of Bickley, Camden Park, and Sundridge Park, along the boundary line between Bromley and Chislehurst formed by the stream under the Bickley Woods. The horizontal chalk adits, now in many parts choked up with sand fallen in from above, (and these adits extend to great lengths in various directions underground,) must have been worked for many ages.
   Under Camden Park, it is reported among the chalkworkers, that waggons and horses have been led underground, into horizontal adits and passages. The openings, however, are now closed up with sloping banks of fallen sand.