Fueros discusses defense of mining district and transportation of ore and food supplies. Abundant production at Placeres if free from enemy raids. Miners do not like to operate too far away due to fear of barbaros. Describes grano de oro found by Indian -- its size, value, type of rock found in (guija). grano worthy of king but already broken up and distributed by Indian to relatives. Discusses efforts to try to stop this from happening again. Discusses activities of soldiers sent to guard mining region. Report from Fueros on comerciante in charge of transporting gold -- gives amount and how warned to insure delivery of royal fifth. Closure of road noted and problems this causes for mining operations. Mentions real Caxa de los Alamos and administrador de la Renta de tabacos. (S. Fiederlein may 1987)