Contour map from Reports: John E. James' “Notes on conversations with Mr. Barat and others”

Contour map from Reports: John E. James' “Notes on conversations with Mr. Barat and others”, Folder: 7. El Potosí Mining Company Records, 33399703. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/263506 Accessed September 26, 2026.