Although not in precise accordance with the plan of this work, yet, on account of the interest which attaches to the subject, we devote a few pages to an exposition of the various theories advanced in relation to the _origin_ of the Indian tribes existing at the time the English settled the country. These theories have been various, according to the whims or predilections of the authors. Some have seen in them an original species of the human race, unconnected with any of the nations or tribes of the old world. Others have fancied their resemblance to this or the other people, ancient or modern, of the eastern continent--as Hebrews, Trojans, Tartars, and the like. Voltaire, and other skeptical writers, have accounted for their origin, according to the first-named theory. They have considered the Indian placed in America by the hand of the Creator, or by nature--just as the buffalo, or the tortoise, or any other animal, was placed there--or just as trees and other products of vegetation, that are indigenous to the soil. Thus they make no account of the apparent scriptural doctrine of the unity of the human race--the common descent from Adam. The identity of the Indian with the Hebrew or the Israelite has been conjectured by many. Rev. Thomas Thorowgood, an author of the seventeenth century, held that opinion, and endeavored to prove that the Indians were the Jews, who had been lost in the world for the space of near two thousand years. Adair, who claims to have resided forty years among the southern Indians, published a large quarto upon their origin, history, &c. He endeavors to prove their identity with the Jews, by showing the similarity of their customs, usages, and language to those of the latter. The author of the Star in the West, Dr. Boudinot, has followed the same thing, and thinks assuredly that the Indians are the long-lost ten tribes of Israel. Roger Williams, at one time, expressed the same opinion. He writes, in a letter to friends in Salem, that the Indians did not come into America from the north-east, as some had imagined, for the following reasons: 1, Their ancestors affirm that they came from the south-west, and return thence when they die; 2, Because they separate their women, in a little wigwam by themselves, at _certain seasons_; and 3, Beside their god Kuttand, to the south-west, they hold that Nanawitnawit (a God overhead) made the heavens and the earth; and he avers, also, that he (the writer) had found "some taste of affinity with the Hebrew."