- 4 - 
IBS 
?IHGS . 
practically continuous for a mile or two in length 
and over a width reaching in places possibly half a 
mile. It is not unlikely that there are other worked areas 
in 'the vicinity, * no outcrops of the 
obsidian, or, in fact, of any other rock, are to be seen 
on this part of the mountain * and it is apparent that 
the ancient minors had exploited the entire slope in 
search of deposits lying at varying depth beneath the 
surface . 
The depth of the wider depressions usually does 
not exceed six or eight feet, but some are weeper, and 
aony take the form of wells fro© three to ten feet in 
diameter and often fifteen -or twenty feet deep, with 
vertical or overhanging walls* Many of these must 
have been much deeper, for the debris thrown out is 
s*~ri**4* 
more extensive than the present openings would 
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% 
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