Notes great excitement caused by discovery silver Pimeria Alta, belief in greater riches-gold, silver, pearls, quicksilver-to north. Discusses Indian belief ancestors Mexican kings from Pimeria describes ruins of Casa Grande, Casas Grandes. Notes previous expeditions to Colorado River, proposes expedition led by himself to- 1) determine if California an Island and whether northwest Passage, seven cities Gran Teguayo, Quivira exist; 2) determine number inhabitants interior region, whether they are agricultural and can be reduced, or hunter-gatherers impossible to missionize; discover extent Mineral wealth beyond Pimeria. Notes inability presidio to mount Apache campaign because of Seri uprisings, occasional Pima troubles. Outlines size/ expenses proposed expedition. (T. Sheridan) (1976)