Valley of the Mississippi, occupied by the "Mound Builders."

Moreover, he tells us that "this vast power was gathered into one;" that
is to say, from Egypt to Peru it was one consolidated empire. We will
see hereafter that the legends of the Hindoos as to Deva Nahusha
distinctly refer to this vast empire, which covered the whole of the
known world.

Another corroboration of the truth of Plato's narrative is found in the
fact that upon the Azores black lava rocks, and rocks red and white in
color, are now found. He says they built with white, red, and black
stone. Sir C. Wyville Thomson describes a narrow neck of land between
Fayal and Monte da Guia, called "Monte Queimada" (the burnt mountain),
as follows: "It is formed partly of stratified tufa of a dark chocolate
color, and partly of lumps of black lava, porous, and each with a large
cavity in the centre, which must have been ejected as volcanic bombs in
a glorious display of fireworks at some period beyond the records of
Acorean history, but late in the geological annals of the island"
("Voyage of the Challenger," vol. ii., p. 24). He also describes immense
walls of black volcanic rock in the island.

The plain of Atlantis, Plato tells us, "had been cultivated during many
ages by many generations of kings." If, as we believe, agriculture, the
domestication of the horse, ox, sheep, goat, and bog, and the discovery
or development of wheat, oats, rye, and barley originated in this
region, then this language of Plato in reference to "the many ages, and
the successive generations of kings," accords with the great periods of
time which were necessary to bring man from a savage to a civilized
condition.