Quite a find! This would have been sent out to the prospective investor. The company is still in operation today after over 120+ years! This would have been around 1902 or so. Much pertinent information is given about the mine and its operations with great photos, letters and a map. Included is a classy touch having the letters on the cover in copper... ORIGINAL VTG circa 1902 MINING Prospectus~"SANTA EMILIA COPPER CO"~NYC