Note 16 — Chapter I · FROM MOURZUK TO KOUKA IN BORNOU.
Reading edition
The lakes have marshy borders, and high salt islands, as if formed by man, which however are natural, and, the people say, have existed since their remembrance. The saline materials are a carbonate and muriate of soda: we saw no incrustations on the bottom or surface: at this season, the same is the case in the Bahr-Trona, in Fezzan. Each lake is not more than half or three-fourths of a mile in circumference.—W. O.