Procession of Bisharin and Ababda, Egypt, 1830-1831.

EGYPT - SEPTEMBER 18: Lithograph by Laurens after Louis Maurice Adolphe Linant de Bellefonds (1799-1883) showing a camel caravan accompanying Linant de Bellefonds to Gabal �Alba (Mount Elba). Illustration from his �L'Etbaye, pays habite par les Arabes Bicharich: geographie, ethnologie, mines d'or�, (The Atbai, land inhabited by the Bisharin Arabs: geography, ethnology, gold mines�), published in Paris in 1868. (Photo by SSPL/Getty Images)