The exploration of the caves in the Vale of Clwyd, and the conclusions announced by Dr. Hicks at the last meeting of the British Association, have naturally aroused much interest; for if the facts are rightly interpreted by Dr. Hicks, and the deposits which are banked up against the north-western end of the cave are really of Glacial age, then it is clear that the contents of the cave date from a time anterior to the great submergence during which those deposits were formed.