ADDITIONAL PREFACE. 
In August, 1875, I was appointed by the honorable Secretary of the 
Interior a special commissioner to make collections from Western Nevada 
and California for the Centennial Exhibition of 1876. While prosecuting 
that mission I was enabled to collect additional information, all of which 
has been incorporated into this volume. 
seal es 
Wasuineton, D. C., October, 1876. 
