This document contains excellent information on the status of mining in the real de Guanasevi. Included- the names of mines and their owners; water availability (seasonality) and location; ore location and quality; mining techniques (both ancient and modern); availability and prices of supplies (mercury, salt, wood); wages of the barreteros (laborers) and the difficulty of keeping them employed; the geography of the area. (R. Perez) (1977)