I76 SMITHSONIAN INSTITUTION 



Northward from this point the watershed between the Snake River 

 and the Humbolt is crossed. Here on the headwaters of the Bruneau 

 River several caves were visited. In the vicinity of Coyote Lakes a 

 very interesting outcrop of white opal was discovered. This had been 

 intensively quarried by the Indians. Most of the implements dis- 

 covered for many miles around appear to have been made of material 

 from this quarry or from obsidian obtained from the lava beds farther 

 to the north. The entire region, which is well watered and abundantly 

 supplied with game, made an ideal environment for the Indian, except- 

 ing for the one drawback of a very severe winter climate. 



