University of Arizona

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Elgin Bryce Holt Report

1927
MS 157
Collection Guide

Elgin Bryce Holt (1873–1945) was an American mine engineer and owner, geologist, anthropologist, and entrepreneur. Holt reorganized and managed the Cerro de Plata Mining Company in Magdalena, Sonora, Mexico, where he found success in mining silver and was known as "Silver King of Sonora."

The collection contains a 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 hand-drawn map of important mining camps in the area.

 

 

Included materials:
Manuscript
Subject Area:
Mining
Collection Area:
Borderlands

Land Acknowledgement

We respectfully acknowledge the University of Arizona is on the land and territories of Indigenous peoples. Today, Arizona is home to 22 federally recognized tribes, with Tucson being home to the O’odham and the Yaqui. Committed to diversity and inclusion, the University strives to build sustainable relationships with sovereign Native Nations and Indigenous communities through education offerings, partnerships, and community service.