Page:Geological Evidences of the Antiquity of Man.djvu/200

182 rock, about forty-five feet above the brook, is now visible the entrance of a grotto, a, fig. 25, which opened originally on the terrace h, c, k, which slopes gently towards the valley.

Until the year 1852, the opening into this grotto was masked by a talus of small fragments of limestone and earthy