1930 — Topographic and Geologic Map of the Property of the New York-Idaho Exploration Co., Blaine County Idaho — “Eureka Mine” — 44.5″ x 19.5″

Someone marked out “New York-Idaho Exploration Co” and wrote in “Eureka Mine.”

This map is 44 inches wide and almost 20 inches tall. Folded with creases, but in fantastic condition!

U.S. Geological Survey; Bulletin 814. Plate 20.

Geology by R. W. Landwehr

Topography by R. W. Landwehr