James Richardson,
Narrative of a Mission to Central Africa Performed in the Years 1850-51…
“ Mourzuk is situated in a sandy depression on its surface, which would probably be turned into a salt lake if there were sufficient rain. The limits of the hollow, as of that of many others—Wady Atbah for example—are not noticed by the traveller. Whether he approaches or leaves Mourzuk, he seems still to be traversing a level plain, and only finds his mistake by noticing the change in the nature of the ground, the presence of marshes, of green vegetation, and of a heavy, stifling atmosphere. ”
