S. JS. Warren — Age of Stone Tnqjlements. 105 



unabraded contemporary series (P. 65-75), confined to a definite 

 horizon (the ' Palgeolithic Floor '), above that of the earlier 

 implements. Thus we see that at the time P. 65-75 the 

 implements of P. 30-40 held very much the same position in 

 those river gravels which Paleeolithic implements generally hold in 

 our modern river gravels ; while the intermediate series (P. 55-60) 

 were being rolled about in the bed of the river, then swifter and 

 broader than at present, just as Neolithic implements are lying in 

 the beds of our rivers to-day. 



At the ' high-level terrace ' of Saint-Acheul, near Amiens, 

 again, we find : a derived series (P. 30-50, probably P. 30-40) ; 

 perhaps an early contemporary series at the base of the deposit 

 (? P. 40-55) ; an unabraded and contemporary series in the middle 

 beds (P. 60) ; while another contemporary unabraded series occurs 

 in the brickearth above (P. 65-75). There are also others (P. 60-80) 

 in the lower drifts of Menchecourt, etc., and, as already mentioned, 

 perhaps still later forms (? P. 75-90) in the later brickearths. 



I will refer to only one other district — one where the phenomena 

 are widely different from either Stoke Newington or Saint-Acheul — 

 and that is the country around Thetford and Mildenhall.^ Here 

 there is, first, the high-level terrace of Brandon Down and Laken- 

 heath, which is unconnected with the present river system. These 

 gravels yield implements (P. 30-50) which often seem to have been 

 derived from the surface soil of the period rather than from an 

 earlier drift, together with contemporary forms (P. 50-65). Below 

 these high-level gravels there are, in the present valleys of the 

 Little Ouse and the Lark, the deposits of High Lodge, near 

 Mildenhall, and Santon Downham, near Thetford, yielding con- 

 temporary implements (P. 65-75) ; while at various levels below 

 these, in the same valleys, there are the gravels of Warren Hill, 

 near Mildenhall, Eedhill, near Thetford, Shrub Hill, in the parish 

 of Feltwell, and other places, containing a mixture of derived 

 implements of various ages (P. 30-75), together with a certain 

 proportion of contemporary implements (P, 75-99), especially at 

 Shrub Hill. Some of these last implements are of the usual 

 Palgeolithic types, some remind one of the ruder forms of the 

 Neolithic Period, while others are almost counterparts of the 

 surface implements, of somewhat uncertain age, from the Plateau 

 of Leugny (Vienne) and other places in Poitou and Brittany. 



Conclusion. 



Although it is perfectly true that no conclusions can be drawn 

 either from mere rudeness of workmanship in individual specimens, 

 or from a few implements chancing to have, or not to have, an 

 ochreous patina, yet I am confident that it is from such evidence 

 as is indicated in this paper, that the more detailed history of 

 early man must be read. 



' The best general account of this district is to be found in Sir John Evans' 

 " Ancient Stone Implements," 1897, 2nd ed., pp. 543-572. 



