Rohlfs informs us that " any one who did not know the way " by which the caravans passed " would only have to follow the bones which lie right and left of the track."
The Moroccan system was visited, and in some instances crossed, by various European travellers carried into slavery by the Salli rovers, and was traversed by Rene Caille in 1828 on his journey home from Timbuktu, but the first detailed exploration was made by Gerhard Rohlfs in 1861-1862.
De Foucauld, Reconnaissance au Maroc 1883-1884 (Paris, 1888, almost the sole authority for the geography of the Atlas; his book gives the result of careful surveys, and is illustrated with a good collection of maps and sketches); Hooker, Ball and Maw, Marocco and the Great Atlas (London, 1879, a most valuable contribution, always scientific and trustworthy, especially as to botany and geology); Joseph Thomson, Travels in the Atlas and Southern Morocco (London, 1889, valuable geographical and geological data); Louis Gentil, Mission de Segonzac, &c. (Paris, 1906; the author was geologist to the 1905 expedition); Gerhard Rohlfs, Adventures in Morocco (London, 1874); Walter B.
The first European to visit Tafilalt was Rene Caillie (1828), the next Gerhard Rohlfs (1864).
According to Gerhard Rohlfs, the last form given to the word most correctly represents the Arabic pronunciation, but the other forms are more often used in Europe.
Rohlfs, Reise durch Marokko ...
Rohlfs, Von Tripoli nach Alexandrien (1871); G.
South of Morocco proper, Gerhard Rohlfs, who travelled extensively in the region (c. 1861-1867), states that a Berber religious corporation, the Savia Karlas, was ruled over by a woman, the chief's wife.
Rohlfs, Reise durch Marokko (1869); Quer durch Afrika (1874-1875); General Faidherbe, Collection complete des inscriptions numidiques (lybiques) (1870), and Les Dolmens d'Afrique (1873); H.