10 - 
St range ly enough, there seems to be an almost total 
absence on this site of the manufacture of incipient leaf- 
blade forms from which knives , spearpoints, and arrowheads 
were usually specialised, but blade-derived implements are 
found plentifully in the fields about the base of the 
mountain (fig. 8). They must have been produced in 
other quarries than those examined* 
It may be difficult to identify the workers of these 
minm with any particular people, but it would seem safe 
to conclude that the Aztecs had a hand in the work* The 
knives were found in extensive use by tills people and 
the sites of these an well as of other stocks abound in 
the characteristic implements. 
HOTSi- Other Mexican Quarries. 
