476 PLEISTOCENE DEPOSITS. CHAP. 



One retains the crust of carbonate of lime usual on many of the 

 fragments and pebbles found in that gravel. Taken in the order 

 of their relative rudeness and probable date, the first (Fig. i) is of 

 the early type of Amiens and Hoxne a wedge of flint chipped to 

 a triangular shape in front by the aid of many blows. Its surface 

 is 'patinated,' as the expression now is, and it has undergone 

 wearing. It was dredged with gravel at Wittenham. Fig. 2 is 

 a round thick-edged ' scraper' from Wittenham, and Fig. 3 a pecu- 

 liar specimen from Hounslow. 



5 4 



Diagram CCIV. Implements from the drift. Scale one-fifth of the objects. 



4. Flint Tapering, chipped on both edges and over both faces, and polished by 



friction to one curved cutting edge, not injured by use. Long Wittenham. 



5. Flint Expanded at both ends, chipped on both edges and over both faces, 



polished at the broader end to a curved cutting edge, a little broken by use. 

 Long Wittenham. 



The next to be noticed (Fig. 4), of much advanced workmanship, 

 also obtained from the river-bed, is thickly encrusted at many 

 points by the calcareous deposit usual in the gravel, and sometimes 

 also observed as the effect of the river water. It is a chisel or 

 hatchet blade, made from a dark flint flake, almost six inches long, 

 expanding from less than an inch at one end to almost two inches 

 at the other. The sides have been straightened and brought to 

 an undulated edge by about one hundred effective blows or 

 pressures, of which the traces remain. The broad end is ground 

 smooth on both sides to a curved sharp edge, which apparently 

 has been uninjured. It resembles specimens from the north of 

 Ireland. Weight, 6*25 oz. 



