^^^' 55-] PEBBLES OE SCHOEL-EOCK IN DEIFT-DEPOSTTS. 223 



farther. In reply to Mr. Matley, he did not deny the presence 

 of Bunter pebbles from the Midlands in the Drift. They occur 

 plentifully in the Lea Yalley, but differ from those described in 

 the paper. The peneplain required by his argument existed in 

 Pliocene or earlier times, and was probably much broken up during 

 the Glacial period. In reply to Mr. Monckton, he said that the 

 gravels at the Hockett were deposited when the escarpment was 

 not cut so far back, and when the Thames flowed at a higher 

 level, where the Goring gap now is. Similarly there are no 

 remains of the old peneplain and its associated gravels in the 

 Midlands, because the cutting-back of the Chalk escarpment has 

 destroyed them. The finding of these pebbles over so wide an 

 area could not be called negative evidence. He thanked the 

 Fellows for their reception of his paper. 



