168 Mr. P. J. Martin on the Anticlinal Line of 



drift nor delrital matter, save modern alluvium (I must still retain 

 the use of that word), that is not, in antiquarian phrase, of the 

 date "tempore denudationis ;" and it appears to me that the 

 absence of great accumulations of the relics of the higher strata 

 on the lofty ridges and well -washed slopes of the " Forest Kidge " 

 is just what might be expected. In my cursory description of the 

 zones of drift as they mantle round the nucleus of the Weald, I 

 have endeavoured to show, that exactly as we recede from the 

 vicinity of the higher beds, their relics become correspondingly 

 rare. The rounded gravel of the eocene, except here and there 

 a stray pebble, as a general rule, disappears on the thoroughly 

 denuded chalk downs. Entire flint nodules which abound there 

 become rare, and are succeeded by angular and fragmentary in 

 the greensand country. Here, in my subcretaceous zone, we 

 find large accumulations of flint, mixed up with fragmentary 

 chert and sandstone, with now and then a chalk pebble or an 

 eocene pebble, all entangled in deep drifts of disintegrated 

 sand-rock. Descending the escarpment of the lower greensand, 

 we find in the place of flint and gravel, a thin sprinkling of the 

 durable ironstone, and fragments of tb? chert, of the stratum 

 next above, with concretional iron-rag or bog-iron of the Weald 

 clay country, with here and there a small trainee (as Sir Roderick 

 says) of angular and fuscous flints dyed by the iron imbibed 

 from the soil. Of these trainees the bed at Hever approaches 

 hard on the Hastings-sand country and the centre of the de- 

 nudation ; and I had the pleasure of showing another to Sir 

 Roderick at Shipley, four miles south of Horsham. And since 

 that time I have discovered another at Slinfold, three miles west 

 of that town, in the remarkable longitudinal valley which skirts, 

 if it does not lie in, the exact axis of the great anticlinal of the 

 Forest Ridge. Here, near the Roman gate on the road between 

 Stroud and Rudgwick, a bed of dduvium is to be found, with 

 chert and ironstone, and a fair sprinkling of brown flints. 



Agreeably to the foregoing rule of the gradual disappearance 

 of the relics of the superior strata, the elevated rocks of Tun- 

 bridge Wells and the rest of the central districts, as before said, 

 exhibit only here and there, scattered over the surface or turned 

 up by the plough, water-worn fragments of sandstone impressed 

 with Cyprides, fragments of the marble of the \Yeald clay, and 

 finally the detritus of the Hastings sands and clays themselves. 

 To satisfy himself that these are accumulated with all the cha- 

 racters of diluvium, let the observer take the Ordnance Map, mark 

 the deep longitudinal valleys of the Rotber and its tributaries, 

 examine particularly the eastern slopes and spurs of the beautiful 

 and picturesque eminences that there abound, the railway cut- 

 tings that traverse them, and the more fertile hop-gardens of 



