THE journey along the margin of the Atbara was similar to the entire route from Berber, a vast desert, with the narrow band of trees that marked the course of the river; the only change was the magical growth of the leaves, which burst hourly from the swollen buds of the mimosas: this could be accounted for by the sudden arrival of the river, as the water percolated rapidly through the sand and nourished the famishing roots.