Speaking of these spots where a fire has been kindled, I am reminded of those vast burnt plains, often many days' march in extent, which I met with in the desert between Persia and Khiva, and of which I heard so many wonderful tales from the mouths of the nomads. During the hot season of the year, when the scorching sun has dried shrubs and grass till they have become like tinder, it often happens that a spark, carelessly dropped, and fanned by the wind, will set the steppe on fire. The flame, finding ever fresh fuel, spreads with such fearful rapidity that a man on horseback can with difficulty escape. It rolls over the scanty herbage like an overflowing stream, and, when it meets with thicket and shrubs, it flares up with wild wrath. Thus traversing large tracts of country in a short time, its raging course can only be checked by a river or a lake. At night such conflagrations must present a terrible appearance, when far and wide the horizon is lit up with a sea of flame. Even the bravest heart loses its courage at the appalling sight. The cowardly and hesitating are soon destroyed, but one who has sufficient presence of mind can save himself, if, while the flames are yet a great way off, he kindle the grass in his neighbourhood. He thus lays waste a space in which the approaching fire can find no sustenance, and in this he himself takes refuge. Thus only with fire can man contend against fire with success. This weapon is often used by one tribe against another, and the desolation thus caused is terrible. It is often used by a runaway couple to secure themselves against pursuit. As long as no wind blows they can easily fly before the slowly-advancing fire; but it often happens that the flames are hurried forward by the least breath of wind, and the fugitives find a united death in the very means they had taken to secure their safety.