“It appears,” says Bradford, “that the red race may be traced, by physical analogies, into Siberia, China, Japan, Polynesia, Indo-China, the Malayan Islands, Hindostan, Madagascar, Egypt, and Etruria. In some of these nations the pure type of the race may be perceived existing at present, in others many of its characters have been changed and modified, apparently by intermarriage; and, in others, its ancient existence is only to be discovered by the records preserved on their monuments.” “We are constrained to believe,” says the learned Dr. Morton, “that there is no more resemblance between the Indian and Mongol in respect to arts, architecture, mental features, and social usages, than exists between any other two distinct races of mankind.” “I maintain that the organic characters of the people themselves, through all their endless ramifications of tribes and nations, prove them to belong to one and the same race, and that this race is distinct from all others. * * * The evidences of history and the Egyptian monuments go to prove that the same races were as distinctly marked three thousand years ago as they are now; and, in fact, that they are coeval with the primitive dispersion of our species.” Whatever diversity of origin may have existed among the races of Indians whose remains are the burden of our speculations, one thing is certain, that the builders of the ruins of the city of Chi-Chen and Uxmal excelled in the mechanic and the fine arts. It is obvious that they were a cultivated, and doubtless a very numerous people. It is difficult to suppose that any great advance in mechanico-dynamic science could have been made by these people, without some evidence besides their works remaining. Yet it is almost impossible to suppose that those vast erections could have been made by the mere aggregation of men, unaided by science. Herodotus tells us that a hundred thousand men, relieved every three months, were employed in building the pyramid of Cheops in Egypt. Ten years were spent in preparing the road whereon the stones were to be transported, and twenty years more in erecting the edifice. Yet though Cheops had a nation of slaves to do his bidding, and though he employed such multitudes upon this stupendous work, it is generally supposed that he must have been aided by some kind of machinery more powerful than any thing known at the present day.