Blue boards, d.j. by Cuthill, has wear on edges. The Sahara, which today is empty, ws in prehistoric ages densely populated. As it became arid and barren, men fled from it or died: but they left traces almost everywhere - stone implements, cliff engravings, ruined forts and many of them are described in this book. The author's account of his journey in search of them will be a revelation to those who think of the desert as a featureless void.

ADVENTURE - TRAVEL