University of Arizona

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Elgin Bryce Holt Report

Three-page typescript report from Holt to his partner, a Mr. Brock, about the Santa Eulalia group of mines near Sombrerete District, state of Zacatecas, Mexico, dated August 11, 1927. Included are four blueprints: an assay map, a geological plan, a surface plan, and a map; and also a hand-drawn map of important mining camps in the area.