138 01? THE.PATANI. 



same line of strike, as for example from the hill in Goa Tumbus 

 Valley marked " Chew Beng's Mine " a line in the same direction 

 cuts " Epoh Mine " on the next granite exposure, and again on the 

 line marked " Tan Lim," whilst again, further to the north-west, the 

 same continuity exists ; thus a clearly defined mineral band striking 

 from the east of north to the west of south would appear to be 

 established, and, as I have before remarked, it is a question whether 

 this apparent continuity arises from impregnation from the plutonic 

 rocks or is the result of crystallisation in a particular line of mag- 

 netic current or other procuring cause. 



In other words, did the infusion, infiltration, crystallisation or 

 whatever the process which superinduced the formation of the 

 galena (sulphide of lead) occur when the limestone was one level 

 mass or after or at the time of its disturbance, or, on the other hand, 

 are the existence of all the minerals here to be attributed to im- 

 pregnation or metamorphism produced by the plutonic rocks? 

 As I have before stated, I have found no galena veins in the granite 

 ranges themselves. I have found the galena when embedded in the 

 lower shales highly impregnated with pyrites and minus silver and 

 I have found the purest galena and the best yield of silver near 

 the summits of the limestone formation. 



I have often heard it stated in Singapore that the galena of these 

 mines exists in pockets in the alluvial or earthy soil which was 

 apparently assumed to be its natural habit ; the actual fact, however, 

 is that w T hilst it is found frequently in what we call pockets im- 

 bedded in clay and earthy soil, yet in this phase it is not in situ. 

 "When so found it is in the form of more or less rounded boulders 

 of pure galena encrusted with a thin coating of limestone or of 

 carbonate of lead, these boulders I have seen as heavy as six and 

 seven pikuls each ; and as much as seven or eight hundred pikuls 

 was obtained in more than one instance whilst I was there from 

 pockets of this description. Now I have never known any of these 

 so-called pockets in the immediate vicinity of which, that is. within 

 a yard or two or even immediately beneath or above them, there 

 has not been found to exist a lode in situ, and the simple explana- 

 tion of the existence of these boulders of galena is that they are 

 merely the result of the breaking away from the overhanging 



