94. Three men in hats sitting outside irregular hole into rocky hillside; print captioned "LA LEONA IRON MINE, Tunnel No 3, in 241 feet. Property of GUERRERO DEVELOPMENT CO."

94. Three men in hats sitting outside irregular hole into rocky hillside; print captioned "LA LEONA IRON MINE, Tunnel No 3, in 241 feet. Property of GUERRERO DEVELOPMENT CO.", Box: 1. James E. Long Photograph Collection, 352928987. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/416593 Accessed September 26, 2026.