But this was nothing to the fantastic labours before them. Next day, and the day after, and the day after, the march went on, ever south, and ever through more desolate country. They reached the region of the small outpost stations, where men of the penal battalion were at work road-making and fort-building. Here wind came to them that the trouble had shifted more to the east, where a great army of Arabs was at work breaking, pillaging and murdering. Three outpost stations had been sacked and the soldiers put to death, and with this news the Legion, setting its teeth, struck on to the south-south-east. They were entering now the real desert. The great yellow desert that lies burning in the sun for ever. Now voiceless, now sighing and shifting its sand to the wind that blows from nowhere. Here there are no roads, only caravan tracks marked by the skeletons of men and animals, an horizon hard like burnished brass, a thirst that drains even the water in the oasis wells. Jacques, old campaigner that he was, had never grown used to the desert, no white man ever does. There is a spirit here that daunts the soul and haunts the heart for ever. As they marched, sometimes, came marching abreast of them, miles away, vast sand devils, recalling the D'jin released from the bottle in the Arabian tale. Sometimes the devils would move as though waltzing with viewless partners, but the Legion scarcely cast an eye upon them. The Trumpet of Doom alone could have arrested the attention of that vast centipede, sun-dazzled, or moon-lit, exhausted, dead to everything but the necessity of movement. The water ran short, but still they marched; men fell out only to be tied to the tails of the ammunition carts, where they had either to be dragged along the sands or march; feet bled, eyes were blinded, brains reeled, but the purpose of the mechanism never failed, nor did the movement falter. Five kilometres an hour was the inexorable pace to which the machine was set. A longer halt than usual whilst waiting for despatch bearers had shifted the starting hour of each march to one o'clock in the morning. Then, under the stars and in the perishing cold of the desert night, the bugles would ring out, the city of little white tents shrivel up and vanish, and the great centipede reform itself out of all its incongruous elements. Criminals, soldiers of fortune, clerks, once men of learning, men from all the quarters of the world and all the walks of civilization, woke from profound sleep or troubled dreams and became, once again, the Legion.