García, Gregorio.  Origen de los Indios de el Nueuo Mundo, e Indias Occidentales. (Madrid, 1729).

Nowhere is the general confusion and genuine indecision of the sixteenth and early seventeenth-century theorists of Indian origins more pronounced than in this work—the first book published exclusively on the issue [this is the 2nd edition, it was first published in 1607].  García spent nine years in Peru, beginning in the late 1590s.  In order to discover as best he could what the origin of the Indians was, García evaluated what he read, what he was told by both Spaniards and Indians, and what he had seen.  The two fundamental assumptions upon which he based his book were that all men and women descended from Adam and Eve, and after the Deluge from Noah (who divided the world giving Asia to Shem, Egypt and Africa to Ham, and Europe to Japheth).  He believed that the peoples of the Americas came to the New World from one of the three parts of the known world. García examined in detail all the opinions regarding origins current in Europe at the time–derived from the Carthaginians; the lost Jewish tribes; that Peru was the Ophir of Solomon. The “libro ultimo” contains native accounts of their origins, describing the tribes of Mexico and Peru, derived from a manuscript of Juan de Vetanzos (a companion of Pizarro). He rejected none of the origin theories, but accepted them all collectively—that is, in his view, the ancestors of Native Americans came to the New World from different parts of the known world, at different times, and in different ways.

See the Watkison’s copy.