Proceeding through the Landes towards the coast, a long chain of lakes and water-courses, running parallel to the ocean, breaks their uniformity. The country becomes a waste of shallow pools, and of land which is parched in summer and submerged in winter. Running in devious arms and windings through moss and moor and pine, these "lakes of the dismal swamp" form labyrinths of gulfs and morasses which only the most experienced shepherds can safely thread. Here and there a village, or rather bourg, will be seen upon their banks, half hidden in the pine-woods; and a roughly-built fishing-punt or two will be observed floating like the canoe of a savage in the woodland lakes. Sometimes, as in the case of the basin of Arcachon, which will be presently described, these waters are arms of the sea; and the retreating tide leaves scores of square miles of putrid swamp. Sometimes they are mere collections of surface-drainage, accumulating without any means of escape to the ocean, and perilous in the extreme to the dwellers on their shores. For, forming the extreme line of coast, there runs, for near two hundred miles, from the Adour to the Garonne, a range of vast hills of white sand, as fine as though it had been sifted for an hour-glass. Every gale changes the shape of these rolling mountains. A strong wind from the land flings millions of tons of sand per hour into the sea, to be washed up again by the surf, flung on the beach, and in the first Biscay gale blown in whirlwinds inland. A winter hurricane again from the west has filled up with sand square miles of shallow lake, driving the displaced waters inland, dispersing them in gleaming lakes among the pine-woods, flooding, and frequently destroying the scattered hamlets of the people, and burying for ever their fields of millet and rye. I shall presently have occasion to touch upon some disasters of this sort. Meantime, having made the aspect of the Landes familiar to the reader, I pursue the thread of my journey.