Area enclosed by the Gila, Rio Grande del Norte, and Colorado -- A Land of Mystery -- Wonderful Reports and Adventures of Missionaries, Soldiers, Hunters, Miners, and Pioneers -- Exploration -- Railroad Surveys -- Classification of Remains -- Monuments of the Gila Valley -- Boulder-Inscriptions -- The Casa Grande of Arizona -- Early Accounts and Modern Exploration -- Adobe Buildings -- View and Plans -- Miscellaneous remains, Acequias, and Pottery -- Other Ruins on the Gila -- Valley of the Rio Salado -- Rio Verde -- Pueblo Creek -- Upper Gila -- Tributaries of the Colorado -- Rock-Inscriptions, Bill Williams' Fork -- Ruined Cities of the Colorado Chiquito -- Rio Puerco -- Lithodendron Creek -- Navarro Spring -- Zuñi Valley -- Arch Spring -- Zuñi -- Ojo del Pescado -- Inscription Rock -- Rio San Juan --Ruins of the Chelly and Chaco Cañons -- Valley of the Rio Grande --Pueblo Towns, Inhabited and in Ruins -- The Moqui Towns -- The Seven Cities of Cíbola -- Résumé, Comparisons, and Conclusions 615 CHAPTER XII. ANTIQUITIES OF THE NORTHWEST. General Character of North-western Remains -- No Traces of Extinct or of Civilized Races -- Antiquities of California -- Stone Implements --Newspaper Reports -- Taylor's Work -- Colorado Desert -- Trail and Rock-Inscriptions -- Burial Relics of Southern California -- Bones of Giants -- Mounds in the Saticoy Valley -- New Almaden Mine --Pre-Historic Relics in the Mining Shafts -- Stone Implements, Human Bones, and Remains of Extinct Animal Species -- Voy's Work -- San Joaquin Relics -- Merced Mounds -- Martinez -- Shell-Mounds round San Francisco Bay, and their Contents -- Relics from a San Francisco Mound -- Antiquities of Nevada -- Utah -- Mounds of Salt Lake Valley --Colorado -- Remains at Golden City -- Extensive Ruins in Southern Colorado and Utah -- Jackson's Expedition -- Mancos and McElmo Cañons -- Idaho and Montana -- Oregon -- Washington -- Mounds on Bute Prairie, and Yakima Earth-work -- British Columbia -- Deans' Explorations -- Mounds and Earth-works of Vancouver Island -- Alaska 687 CHAPTER XIII. WORKS OF THE MOUND-BUILDERS.