The only breaks in this regular coast-wall are the spines and spurs protruding seawards; the caverns in which the surges break and roar, and the _ribeiras_ or ravines whose heads are far inland, and whose lines show grey second distances and blue third distances. At their mouths lie the sea-beaches and the settlements: the latter, with their towered churches and their large whitewashed houses, look more like detached bits of city than our notion of villages. Other places are built upon heaps of _débris_ washed down from the heights, which hold out no promise of not falling again. The huts scattered amidst the cultivation remind one of nothing but Africa. In some places, too, a soft layer of tufa has been hollowed for man's abode, suggesting, like the caves, a fine old smuggling-trade. As many as eight doors may be counted side by side. In other places a rock-ledge, or even a detached boulder, has been converted into a house by masonry-walls. We shall seldom see these savageries on the eastern coast of the island. The seafaring settlements are connected with the interior by breakneck paths and by rude steps, slippery with green moss. The people seem to delight in standing, like wild goats, upon the dizziest of 'jumpy' peaks; we see boys perched like birds upon impossible places, and men walking along precipice-faces apparently pathless. The villages are joined to one another by roads which attempt to follow the sea-line; the chasms are spanned by the flimsiest wooden bridges, and the cliff is tunnelled or cut into a _corniche_. After disembarking passengers at Ponta d'Agua and Ribeira Nova we passed the great landslip of 1805, Lugar do Baixo. The heap of ruins has long been greened over. The cause was evidently a waterfall which now descends freely; it must have undermined the cliff, which in time would give way. So in the Brazil they use water instead of blasting powder: a trench is dug behind the slice of highland to be removed; this is filled by the rains and the pressure of the column throws the rock bodily down. We shall find this cheap contrivance useful when 'hydraulicking' the auriferous clays of the Gold Coast.