If you can, try to get your hands on the RGS Story Volume 2. It covers exclusively Telluride and the mines in this area.
It really worth it, and it's not the most expensive volume of the RGS Story series either.
For online sources, you can also go to the Denver Public Library for lots of photos of Telluride !
------------------------------------------------------------
Sebastien
SNCF passenger trains engineer
Volunteer on the "Chemin de Fer de Rillé" (60cm/2ft, France)
www.aecfm.fr
cfrtrain.blogspot.fr