The discovery of America was itself one of the great events in the most memorable era of the world’s progress. It wrought a marvellous change in the ideas and opinions of mankind relative to the planet they occupy, and prepared the way for many subsequent revolutions in thought, as well as in action. The world as the arena of human history was thenceforth divided into the Old and the New. In the one hemisphere tradition and myth reach backward towards a dawn of undefined antiquity; in the other, history has a definite and altogether modern beginning. Nevertheless no great research is needed to show that it also has been the theatre of human life, and of many revolutions of nations, through centuries reaching back towards an antiquity as vague as that which lies behind Europe’s historic dawn; and the study alike of the prehistoric and the unhistoric races of America is replete with promise of novel truths in reference to primeval man. Some of the oldest problems in relation to him find their solution there; and, amid the novel inquiries which now perplex the student of science, answers of unexpected value are rendered from the same source. The study of man’s condition and progress in Europe’s prehistoric centuries reveals him as a savage hunter, armed solely with weapons of flint and bone, frequenting the lake and river margins of a continent clothed in primeval forests and haunted by enormous beasts of prey. Displaced by intrusive migrations, this rude pioneer disappears, and his traces are overlaid or erased by the improved arts of his supplanters. The infancy of the historic nations begins. Metallurgy, architecture, science, and letters follow, effacing the faint records of Europe’s nomadic pioneers; and the first traces of late intruders acquire so primitive an aspect, that the existence of older European nations than the Celtæ seemed till recently too extravagant an idea for serious consideration.