Note 35 — 9. Can Travel in the Great Tracts of the Libyan Desert which are now Waterless be facilitated by the Sinking of New Wells?
Reading edition
It is possible that the “Nubian Sandstone” in South-Western Egypt may represent more than one geological system, as has been found to be the case in Sinai. Col. Tilho (Geogr. Journ., 56 (1920), p. 259) records that the sandstone at Ennedi proved to be of Upper Silurian age by the fossils found in it.