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 122 THE CORNWALL COAST who may be responsible for all these. But does the ordinary visitor care much about these questions of dedication and saint-lore ? Probably not. South of Cadgwith are some of the grand caves and rock-freaks that have a more immediate appeal, and north of the hamlet some of the best serpentine is obtained. Serpentine is a blend of silica and manganese, so named from its imagined resemblance to a snake's skin ; its colour varies from green to red and brownish yellow, and is often remarkably beautiful. It has been used with striking effect, architecturally, in Truro Cathedral ; while with regard to its use for ornaments and decoration, the visitor has many opportunities of judging for himself. When we remember the seas to which these shores are exposed, it is easy to understand how the coast has been eroded into its present con- torted and cavernous condition. Massive rocky frameworks have resisted the action of the waves, but softer measures have yielded ; the shore has been licked into hollows, basins, caves, by con- tinuous water-action, and the process continues unendingly. One remarkable excavation of this kind is the Devil's Frying-pan, covering about two acres, which the sea enters through an archway of rock at high tides ; the pit is nearly 200 feet deep. Literally, it is a cave whose roof has fallen in. Close to this is Dollar Hugo, a cave whose roof has not fallen nor seems likely to, with a magnificent gateway of serpentine. The name is sometimes spelt Dolor, suggestive of grief, but its origin is not easy to trace ; Hugo seems to be a corruption of the Cornish word fogou, meaning a cave. Johns, who wrote a very interesting book about the Lizard some sixty years since, said