Conflicting accounts of the American Aborigines—Recent discoveries—Climate of California in Tertiary Times—Geological changes near its close—Description of Table Mountain—Results of the discoveries there—The Calaveras skull—Other relics—Discussion of the question—Early Californians Neolithic—Explanation of this—Date of the Pliocene Age—Other discoveries bearing on the Antiquity of man—Dr. Koch’s discovery—Discoveries in the Loess of Nebraska—In Greene County, Ill.—In Georgia—Difficulties in detecting a Paleolithic Age in this country—Dr. Abbott’s discoveries—Paleolithic Implements of the Delaware—Age of the deposits—The race of Paleolithic man—Ancestors of the Eskimos—Comparison of Paleolithic Age in this country with that in Europe—Eskimos one of the oldest races in the World. Chapter X: THE MOUND BUILDERS. Meaning of “MOUND BUILDERS”—Location of Mound Building tribes—All Mounds not the work of men—Altar Mounds—Objects found on the Altars—Altar Mounds possibly burial Mounds—Burial Mounds—Mounds not the only Cemeteries of these tribes—Terraced Mounds—Cahokia Mound—Historical notice of a group of Mounds—The Etowal group—Signal Mounds—Effigy Mounds—How they represented different animals—Explanation of the Effigy Mounds—Effigy Mounds in other localities—Inclosures of the Scioto Valley—At Newark, Ohio—At Marietta, Ohio—Graded Ways—Fortified Inclosures—Ft. Ancient, Ohio—Inclosures of Northern Ohio—Works of unknown import—Ancient Canals in Missouri—Implements and Weapons of Stone—Their knowledge of Copper—Ancient mining—Ornamental pipes—Their knowledge of pottery—Of Agriculture—Government and Religion—Hard to distinguish them from the Indians. Chapter XI: THE PUEBLO COUNTRY. Description of the Pueblo Country—Historical outline—Description of Zuñi—Definition of a Pueblo—Old Zuñi—Inscription Rock—Pueblo of Jemez—Historical notice of Pecos—Description of the Moqui tribes—The Estufa—Description of the San Juan country—Aztec Springs—In the Canyon of the McElmo—The Ruins on the Rio Mancos—On Hovenweep Creek—Description of a Cliff-house—Cliff Town—Cave Houses—Ruins on the San Juan—Cave Town—The Significance of Cliff-houses—Moqui traditions—Ruins in Northern New Mexico—Ruins in the Chaco Cañon—Pueblo Bonito—Ruins in South-western Arizona—The Rio Verde Valley—Casa Grande—Ruins on the Gila—Culture of the Pueblo Tribes—Their Pottery—Superiority of the Ancient pottery—Conclusion. Chapter XII: THE PREHISTORIC AMERICANS.