George Grant MacCurdy,
Smithsonian Report/1909
(1910)
“ The valley deposits are well-nigh inexhaustible. Much, therefore, may be expected of them. With caverns the case is different. The supply of those still untouched is limited; the list of those already wholly or in part excavated is long. Think of the Dordogne, Grimaldi, Kent's cavern, as once more virgin fields! The latter, for example, has contributed little toward a better definition of paleolithic chronology, yet judging from the published illustrations it contained practically every type of industry from the Acheulian to and including the Magdalenian. ”
