The Veiled Man by William le Queux

Ahamadou, squatting upon his haunches before our camp fire, calmly smoking his long pipe, related to me the following story, declaring it to be a true incident. All wanderers in the Great Desert, be they Arabs or Touaregs, are born story-tellers, therefore I reproduce the narrative as he told it. It must be remembered that the Azjars were, at one period -- not so very long ago -- slavers who made many raids in the primeval forests south of Lake Tsad, and that Ahamadou himself profited very considerably by that illegitimate trade. It was rumoured down at "the coast" that the leaders of these Touareg raiders were not Africans, and this story appears to substantiate a statement which was, at the time, ridiculed at the Colonial Office in London.

"Get up, you lazy devil. Stir yourself. We're in a complete hole!"