Ictween Rotherhithe and Limehouse. 377 



Ft. In. Ft. In. 



6. Calcareous rock in which are imbedded 



gravel stones, and so hard as to resist 

 the pick-axe, and to be broken only 

 by wedges 7 6 



7. Light coloured muddy shale, in which 



were imbedded pyrites and calcareous 



stones 4 6 



8. Green sand with gravel and a little water 6 

 g. Green sand 8 4 



68 4 



From the surface of the ground to high water 



marjk , 8 O 



Depth of the shaft from high water mark 76 4 



The gravelly stratum No. 2, in the shaft extends about 

 400 feet into the river from high water mark at T to V; at 

 this latter place it is about two feet thick, and underneath 

 is alluvial earth approaching the nature of clay. 



The framing of the drift consists of three-inch plank, five 

 feet high, three feet wide at bottom, and two feet six inches 

 at the top inside. 



Fig. 2 is a plan of the drift-way and shaft. 

 In proceeding with the drift-way from the south to the 

 north shore, the strata were constantly varying at the face 

 of the drift as noted at the following places specified. The 

 variations in the intermediate spaces were not noted. 

 Face of the drift at the entrance from 

 the shaft, measuring from the bot- 

 tom upwards, Ft. In. Ft. In. 



Green sand , 4 6 



Gravel , 6 



. — t* 5 Q 

 At 177 feet from the shaft, 



Green sand 4 



Gravel ,...() 6 



Blue muddy shale ...... O 6 



5 O 



A.t 234 feet, Green sand , 3 9 



Gravel 3 



J31ue muddy shale l o 



« 5 O 



M 



