ABSTRACT
In all these areas, dependable observations and precise data are sadly lacking. How many industries can be found in situ or paleontologically noted throughout the Sahara, when fewer than half a dozen prehistoric sites, all of which are recent (Neolithic), have been dated by C-143
An,added difficulty in which the researcher so often finds himself lies in the impossibility of judging, at a distance, the value of a publication. Thus, one sees the most serious and, in their own geographic field, the most competent authors at times, citing works or reports of debatable merit that, though taken from good sources, do not always have the value of the distant reader may be tempted to give them. ' I want to draw attention to the fact that the original text was in French and that, in
Given these conditions, with such a basic and serious lack of documentation
the only reasonable and possible proposal here was a rearrangement of certain bits of evidence, and a careful attempt at confronting and interpreting them, with the hope of placing them in an historico-geographical framework large enough that future syntheses may find the ground to some extent cleared.
