Under Sundridge Park, lower down the valley, the chalk lies deeper, and is there overlaid by those interesting "tertiary" conglomerate beds, described by Buckland and others, containing the Ostrea Bellovacina, Cyrena, Serpulae, etc.; but here, surface ground has sunk into a cavity below.
   Along the watercourse under Camden Park, the stream is here and there suddenly lessened in volume, and one may observe the water engulfed on one side of the bank or the other, in what are termed, in various parts of the kingdom, swallet- or swallow-holes.
   In Camden Park the excavations in the side apertures of the protruding chalk rock, as they now appear, are of recent origin.
   In May, 1857, a labourer was employed in Camden Park pit, in cutting chambers in the chalk at right-angles, and removing chalk for lime-burning; suddenly his pickaxe entered a mass of dark, soft, pulpy, sandy earth. On widening the aperture the mass of dark earth appeared in considerable quantity, and the skull of a large dog or wolf, with several delicate land shells, rolled with the mass at his feet. A few gentlemen visited the spot, and, assisted by careful labourers, the earth was removed, and well examined, both in situ and in separation. The first large skull found was of delicate texture and much shivered. The parts however were afterwards united, and appearances suggested the possibility of its being the skull of the Anoplotherium ; competent authorities have, however, suggested that it is that of the extinct Bos longifrons. Unfortunately the teeth were wanting, and the sockets were too much fractured for very accurate judgment.
   The accidental pickaxe-blow fortunately entered the base of the cavity, and this was first explored; the compact nature of the earth above allowed this mode of proceeding. At or near the base were found great