Note (return) — LECTURE XV
Reading edition
While this is the general character of the caves which are to be found hidden away in the forests, many of those near the shore consist simply of apertures hollowed out in the face of the cliffs by the slow but continuous action of the waves in the course of ages. On the beach itself sea-caves are found in which the rising tide precipitates itself with a hollow roar as of subterranean thunder; and at a point, some way back from the strand, where the roof of one of these caves has fallen in, the salt water is projected into the air in the form of intermittent jets of spray, which vary in height with the force of the wind and tide.533