DENVER & mo GRAKDE WESTERN ROUTE. 



107 



or prospecting stage, would be incomplete without mention of the 

 humble burro (see PI. L, ^), that patient beast of burden which has 



/.I6i 



6061 $ 



soer 



eesi 



6881 



1981 



syvnoa jo SNomiw 



fairly regular, except for two marked 

 depressions, one in 1897 and the other 

 in 1908. The first of these depressions 



was due to a strike, which caused 

 many of the mines to become flooded, 

 and the second to the generally low 



