Duane A. Smith is professor of history, Fort Lewis College, Durango, Colorado. He is also the author of San Juan Gold: A Mining Engineer's Adventures, 1879-1881.||Karen Vendl is a retired geologiss who is interested in Colorado mining history. She and Mark Vendl are currently the managing editors for an update to a classic mineralogy book, Mineralogy for Amateurs, by John Sinkankas.|Mark Vendl is a retired geologiss who is interested in Colorado mining history. He and Karen Vendl are currently the managing editors for an update to a classic mineralogy book, Mineralogy for Amateurs, by John Sinkankas

