SOME BOOKS OF THE WEEK.
(Notice in this column does nod necessarily preclude subsequent review.]
The Geographical Journal for August contains the first part of an important paper by Colonel Tilho on the exploration of Tibesti and Borku from 1912 till 1917, with a new map of this almost unknown region. Colonel Tilho headed the French column which occupied Borku in the winter of 1913, just in time to deprive the Senussi of a rallying-ground south of the Sahara through which their German and Turkish allies intended to cause trouble for the French and British in Central Africa. As it was, the French were able to hold the Senussi in check from the south while our Egyptian Expeditionary Force dealt with them in the north. The most important geographical result of Colonel Tilho's explorations was his demonstration that Lake Chad was never connected with the Nile, as seine authorities have conjectured, but is, like the Caspian, the survival of an inland system of lakes and rivers, most of which have disappeared.
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