holmes] 



ABORIGINAL AMERICAN ANTIQUITIES PART I 



247 



easterly direction. A distant view is shown in figure 117 and a 

 nearer view in figure 118. The pittings are surrounded, except 

 at the upper end, by a somewliat uneven ridge of detritus de- 



Fk;. 117. Distant view of the Roljiiisou mine, centor of picture. 



rived from the excavation, which has been added to in places by 

 the modern miners, and has been dug into of late years to recover 

 the mica rejected and thrown out by the aborigines. The average 

 wndth, from crest to crest, of the lateral ridges, which are in places 



Fig. 116. The liubiusou mine, on erest of ridge. 



as much as 15 feet in height, is approximately 75 feet (fig, 119), while 

 the depth within, due to the irregidar heaping up of material from 

 the deep shafts recently sunk by the whites, rarely reaches 20 feet. 



