Field’s _Indian Bibliography_, 3, gives a fair judgment, which, too, expresses the near-consensus of those capable of passing judgment: “Although it cannot be claimed for this author that he ranks first in priority of time, his name is first on our alphabetical register of a great number of writers whose imagination has been struck by the astonishing coincidences of many particulars of the customs and religious rites of some of the American Nations with those of the Jews. The relations of an intelligent observer (as this Indian trader seems to have been), for so long a period as forty years, of the peculiarities of the Southern Indians among whom he resided for that period, is not without great value; although we should have reason to hold it in still greater esteem had the author cherished no favorite dogma to establish, or detested any which he wished destroyed.” McCrady, the South Carolina historian, speaks most favorably of Adair and his book. The comments of Logan in his _History of Upper South Carolina_, as one who lived in the region where Adair resided for a time, and of which he wrote, are peculiarly interesting, and of weight in any fair assize of the book: “From Adair’s book the world has derived most that is known of the manners and customs of the Southern Indians.... Its style is exceedingly figurative and characteristic—partakes much of the idiom of the Indian dialects to which the author was so long accustomed; and this imparts to it a quaintness, which with the novelty of the subject, the remarkable life of the writer, the cogency of his reasoning, his ingenious philosophy, earnest truthfulness and stalwart vigor renders it one of the most interesting as well as valuable works relating to American history.” In behalf of Adair, in his theory of the Jewish origin of the American aborigines, it should be pointed out that a long line of writers both before and after him held the same view. Soon after the discovery of America, the theory was advanced that the Indians derived from the Lost Tribes of Israel. Garcia, in his _Origen de las Medianos_ (1607), declared that these tribes passed Behring Strait and made their way southward, and claimed to have found many Hebrew terms in the American languages. Las Casas was of the same opinion, and the first English writer on the subject, Thomas Thorowgood in his _Jews in America_ (1650 and 1660) followed Las Casas and the Puritan Apostle to the Indians, John Eliot in his _Conjectures_. Antonio Montesinos (1644) found like evidence in Peru, and the learned Jew Manasseh ben Israel visited among the Indians of the New World and reached the same conclusion. Cotton Mather, Roger Williams and William Penn shared the same view. Charles Beatty in his _Journal of Two Months Tour_ (1678) and S. Seawell (1697) advanced proofs in support of the argument.