ILFORD AND WANSTEAD. 163 



Both here and at Wanstead I have obtained many Palaeolithic 

 implements (chiefly flake tools) from the High Terrace Drift. 



As to the foreign boulders of the High Terrace Gravels the 

 occurrence of quartzites, Triassic sandstones, sarsens, gneiss, 

 Carboniferous chert, and mica schist was mentioned. Many of 

 these boulders are of considerable size and it was suggested that 

 they might have been carried by river ice. Recently I obtained 

 four large fragments of chalk in situ in this gravel at Wanstead. 



Middle Terrace Drift. 



In 1899, the excavations for the sewers of the new roads, 

 which have been cut through the fields which lie between Wan- 

 stead Flats and Wanstead Park showed gravel and sand 

 generally of about 20 feet in thickness overlying the London 

 Clay. From these sections I have obtained many Palaeolithic 

 implements, a fair proportion of which have been derived from 

 the High Terrace Drift. Near the south-east corner of Wanstead 

 Park the river Roding has cut into the Middle Terrace gravels, 

 a small natural section of which is there exposed. 



Great II ford. 



A full description of the sections which have been exposed in 

 the Cauliflower Brickyard during the past few years is given in 

 the Geologists' Association paper. At this place, the brickearths 

 are well seen and numerous fossils have been obtained from the 

 sections. The sections which are cut from west to east, i.e., 

 along the northern face of the brickyard vary greatly in detail, 

 but the north to south exposures present more constant 

 characters. This is what one would naturally expect seeing that 

 whereas the former are cut across what may be termed the strike 

 of the beds, the latter on the other hand are coincident with the 

 dip of the strata. Special attention was given by the author to 

 the contorted drift, which from the evidence noted in the before- 

 mentioned paper, I regard as owing its origin to river-ice 

 which floated down the Thames towards the close of the 

 Palaeolithic period. (Two figures of sections of the contorted 

 drift are given). 



The more interesting of the palseontological discoveries 

 made by the author at this place are the following : — 



A specimen of Limmsa glabra was kindly identified for me by 

 Messrs. A. S. Kennard and B. B. Woodward, F.L.S. This 



