130 PROF. PRESTWICIT OX THE AGE, FORMATION, AND 



although it was found at the high elevation of ncarl}^ 000 feet, the 

 position of the site above the extreme head of the valley of the 

 Cray was so slight that this specimen might belong to the later 

 or post-Glacial * drift of that valley, and not to the older level tD 

 which I would assign it. The lines of drainage of the Cray Valley 

 being also from south to north confirmed him in this opinion f. If 

 such a view could be sustained, it might invalidate the antiquity 

 of the Currie-Farm specimen, and by inference the antiquity of 

 those of the Ash district. But though it is true that both drifts are 

 due to currents from the south, the one system of drainage which 

 extended from the central Weald was in existence before the exca- 

 vation of the Holmesdale Valley, whilst the other (the present Ciay 

 and its tributaries) dates from a period subsequent to the severance 

 of the Chalk Plateau from the Lower-Greensaud hills. 



We now, however, have more decisive corroborative evidence of 

 the age of the Currie-Farm specimen. Some time elapsed before 

 an}' new locality was discovered in this district, but within the last 

 two years Mr. De B. Crawshay has found similar implements at 

 other localities on the N. of Halstcad. The interest of these finds 

 is that they occur on the northward ])rolongation of the Eed-Clay 

 plateau at a point where, owing to the valley gradient being more 

 rapid than that of the plateau gradient, the difference of level 

 between them — which near Currie Farm does not exceed a few feet 

 • — amounts to more than 100 feet. At one spot, 1| mile distant 

 from Currie Farm, 480 feet above O.D., and a liitle north of Stone- 

 liouse (fig. 2), Mr. Crawshay has found seven flint implements, 

 two of which are of the rudest Ash type and of the usual dark- 

 brown colour, whilst five are of a light yellow colour and more 

 closely allied to those found at Snag Lane (see p. 145). These latter 

 were found on one of the Broke-Farm fields and may be of later 

 date. 



North of the valley and beyond the Halstead station, Mr. Craw- 

 shay found a large rude flake on He wit's Farm at the level of about 

 470 feet, and more to the east, on the edge of Shacklands Wood (525 

 feet), two stained flakes. In another direction, on a hill where 

 Tertiary flint-pebbles abound, west of ISTorthstead Farm, he records 

 four implements of the Ash type. All these places are on the 

 Red-Clay plateau, here intersected by the dry upper Cray Valley 

 and its tributaries, between which the Halstead and Northstead 

 hills project as promontories, as shown by the plan and section 

 on the next page, figs. 2 and 3. East of AVell Hill, at the level of 

 about 430 feet. Miss H. Waring found a pointed specimen of the 

 Amiens type on Cockerhurst Farm, near Shoreham. 



Farther westward, Mr. Crawshay has discovered on the highest 

 summits of the Chalk escarpment three other implement-bearing 

 localities. The first of these is at Betsom Hill, near Westerham, at 

 the height of 750 to 790 feet ; the second is a little off the summit 



* * Ancient Stone Implements of Great Britain,' p. 531. 

 t Quart. Journ. Geol. Soc. vol. xlr. (1889) p. 295. 



