They have worn the rock smooth, so that it glistens like glass in the morning sun, for, as if aware of the folly of urging on its regiments of well-mounted cavalry to come dashing in upon the wild white-maned sea-horses, or the more sober lines of heavy infantry in uniforms of green and blue, the sea has for countless ages bombarded Carn Du with stone-shot in the shape of great boulders. These have ground and polished off every scrap of seaweed, every barnacle, limpet, and sea-anemone, leaving the rock all smooth and bare, while the boulders lie piled to the east in a heap, where the waves that try to take the rock in flank leap amongst them, and roll them over higher and higher, to come rumbling down as if they were tiny pebbles instead of rounded masses of granite and spar-veined stone a quarter, half, and a hundredweight each. It was an awful place in a storm--Carn Du. It was there that the great Austrian full-rigged ship came on, during one black and raging night; when one minute from the harbour, and off the cliff, the fishermen in their oilskins could see the lights of a vessel--the next minute, nothing. There were the remains of a few timbers, though, in the morning--torn, twisted, gnawed, as it were, into fibres and splintering rags. That was all. It was an awful place in a storm, where the spray, broken up into feathery froth by the battle on the rocks, came flying over the town, and then away landward, like a fine misty rain; but it was a grand place in a calm. It has been said that there was always deep water, even at low tide, at the foot of the Carn, and here for generations had been the training place of the swimmers of Carn Du, who were famous for their prowess all round the coast. It was too much for the boys, but the performance of the big dive was looked upon as the passing of a lad from boyhood into the manly stage, upon which he entered through the Shangles Gate, and then swam back, coming, as it were, of age amidst the shouts of his companions to swim ashore and land upon the big boulders, where the boys bathed and learned to swim in the calm weather, gazing the while in admiration at their older companions. For there was something very stirring in the act, and a stranger to the place would hold his breath in dread as he saw Mark Penelly, who was the finest swimmer at the port of Carn Du, climb up the side of the great black rock upon some fine summer evening, then go round along the narrow shelf of shaley stone, till he stood alone there forty feet above the sea, his white figure as he rested against the black rock, every muscle standing out from his well-knit frame, and his arms crossed, looking like some antique statue in its niche. There were plenty of young men who could perform the feat, but Mark Penelly was acknowledged to be the master.