28 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Nov. 5, 



(p. 276), specimens of the "yellowish sandy material," marked d, 

 lying next upon the vegetable deposit obtained from that shaft, 

 accompany this paper. (See specimen marked " Next upon the 

 deposit, Dalton Road Pit, No. 1.") It seems sufficiently compact 

 to form a cavity. (See also other specimens from neighbouring pits.) 



In the end of this drift, it appears that this yellowish sandy ma- 

 terial was never reached. The last man in did not cut through the 

 vegetable deposit. He informs me that, before abandoning the drift, 

 they worked directly upwards a short distance, in the hope of find- 

 ing ore, until the lights became extinguished by bad air, and a great 

 accumulation of wood was the last material found *. 



In the ground-plan of this pit (fig. 3), kindly furnished by Edward 

 "VVadham, Esq., the position of the iron-ore alluded to in Mr. Bolton's 

 paper (p. 277) likewise indicates a cavern in the pinel, filled in at 

 some time by the mineral. 



Fig. 3.— Flan of Dalton Road Pit (1862). 





Pinel in the face of the 

 workings. 



Soft limestone 



Pinel 



• VWF'iA 



Inferior ore .... 



|<,0 t -Jo] 







Blue clay and sand . 



• (muni 









• mml 



The adit containing the peaty or " woody " deposit lies in a north- 

 easterly direction — not exactly north, as represented in Mr. Bolton's 

 section. Mr. Wadham remarks, " The plan now sent is chiefly from 

 my own recollection, the proper plan having been neglected when it 

 should have been made ; it is, however, correct so far as the differ- 

 ent substances are concerned, for I have a very vivid recollection of 

 the whole working when it was in progress. Your view of the case, 

 as to its being a cavernous deposit, is, in my opinion, perfectly cor- 

 rect ; in fact I have not a doubt upon the subject. The iron-ore, 

 too, as shown upon the plan (fig. 3), was deposited in the same way, 



* On a piece of the deposit-wood in my possession, after removing the blue 

 pigment, Dr. Walker- Arnott discovered what he considered to be the mark of a 

 hatchet. 



