Considering the vast extent of these remains, [i. e. of ancient cities, pyramids and temples] spreading over more than half the continent, and that in Mexico, and South America, after the lapse of an unknown series of ages, they still retain much of ancient grandeur which "Time's effacing fingers" have failed to obliterate. It is certainly no wild flight of the imagination to conjecture that in ancient times, even coeval with the spread of science in the east, empires may have flourished here that would vie in power and extent with the Babylonian, the Median, or the Persian; and cities that might have rivaled Nineveh, and Tyre, and Sidon; for of these empires and these cities, the plains of Asia now exhibit fewer, and even less imposing relics, than are found of the former inhabitants of this country. [1] We venture to say that the aboriginal inhabitants of our hemisphere have not till this day received their meed for ancient bravery, nautical skill, and wonderful attainments in geography and in every branch of material advancement and of civilization generally. Ancient prehistoric America was, indeed, a civilized world. * * * * * Proceeding from north to south, we find from distance to distance unmistakable traces of mighty, skilful, and learned nations that had either wholly disappeared from the face of the earth, or had become degenerated and degraded to such an extent as to be irrecognizable at the time of not only the Spanish, but even of the Northman [tenth century] discoveries. * * * * * The Mayas [Central America] were intellectual giants, indeed. The ruins of their vast public works, of their costly edifices, of their sculptures and paintings, and of their finely carved symbolic writings attest the height of a civilization of which we might well be proud today. And yet all these evidences of a glorious past lay buried for long centuries before Columbus' discovery in the virgin forests of Yucatan. Palenque, Uxmal, Copan, and several other ruined cities of Central America are as grand and beautiful monuments on the cemeteries of the New World as are Troy, Babylon, and Thebes on those of the Old; and their antiquity does not seem to be less venerable. They certainly pertain to America's remotest period. They were ruins more than they are now, in the sixteenth century; the native of the neighboring region knew nothing of their origin, and no notice whatever of the existence of such cities appears in the annals of the surrounding civilized nations during the eight or nine centuries preceding the Spanish conquest. Bancroft is even of the opinion that the Maya grandeur was already at its height several centuries before Christ. [2] After speaking of various evidences of civilization in America, Nadaillac remarks: