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BARRETT, A TRIP TO CAVE HILL 



177 



of stone implements, particularly metates and mullers, and presently we 

 see several of these intact. The site becomes more and more interest- 

 ing the farther we explore and we presently come upon the remains ,of a 

 stone wall, such as that shown in figure 105. It has no mortar of any 

 kind, but is unmistakably laid up for protection on the uphill side of the 



Fig. 105. — Stone wall erected to protect a cave used as a 

 habitation by prehistoric Indians. Cave Hill, Arizona. 



entrance to a nearby cave. The irregular-shaped, dark entrance to such 

 a cave is shown in the lower part of the above figure. 



Upon inspection, we find numerous caves on the south side of this 

 hill, that is on the outer slope of the original cone. All are natural 

 cavities in the lava, made apparently by the draining out of a pocket of 

 still molten material from beneath a crust ,of hardened lava at the time 

 of the formation of the cone. They vary in size from a few feet in 



