"Algiers," says the Arab poet, with genuine Oriental love of precious stones in literature, "is a pearl set in emeralds." And even in these degenerate days of Frank supremacy in Islam, the old Moorish town still gleams white in the sun against a deep background of green hillside, a true pearl among emeralds. For it is a great mistake to imagine North Africa, as untravelled folk suppose, a dry and desert country of arid rocky mountains. The whole strip of laughing coast which has the Atlas for its backbone may rank, on the contrary, as about the dampest, greenest, and most luxuriant region of the Mediterranean system. The home of the Barbary corsairs is a land of high mountains, deep glens, great gorges; a land of vast pine forests and thick, verdant undergrowth. A thousand rills tumble headlong down its rich ravines; a thousand rivers flow fast through its fertile valleys. For wild flowers Algeria is probably unequaled in the whole world; its general aspect in many ways recalls on a smaller scale the less snow-clad parts of eastern Switzerland. [Illustration] When you approach the old pirate-nest from the sea, the first glimpse of the African coast that greets your expectant eye is a long, serrated chain of great sun-smitten mountains away inland and southward. As the steamer nears the land, you begin, after a while, to distinguish the snowy ridge of the glorious Djurjura, which is the Bernese Oberland of Algeria, a huge block of rearing peaks, their summits thick-covered by the virgin snow that feeds in spring a score of leaping torrents. By-and-by, with still nearer approach, a wide bay discloses itself, and a little range of green hills in the foreground detaches itself by degrees from the darker mass of the Atlas looming large in the distance behind. This little range is the Sahel, an outlier just separated from the main chain in the rear by the once marshy plain of the Metidja, now converted by drainage and scientific agriculture into the most fertile lowland region of all North Africa. Presently, on the seaward slopes of the Sahel, a white town bursts upon the eye, a white town so very white, so close, so thick-set, that at first sight you would think it carved entire, in tier after tier, from a solid block of marble. No street or lane or house or public building of any sort stands visible from the rest at a little distance; just a group of white steps, you would say, cut out by giant hands from the solid hillside. The city of the Deys looks almost like a chalk-pit on the slope of an English down; only a chalk-pit in relief, built out, not hewn inwards.