The original American peoples, various and unlike as they were, agreed
in four traits, three of them physical, one mental, which mark them off
as in all likelihood primarily of one stock after all, and as different
from any Old World men: (1) They had low, retreating foreheads. (2)
Their hair was black. (3) It was also of a peculiar texture, lank, and
cylindrical in section, never wavy. And (4) their languages were
polysynthetic, forming a class apart from all others in the world. The
peoples of America, if from Asia, must date back to a time when speech
itself was in its infancy.

[Illustration: Temple Mound In Mexico.]

The numerous varieties of ancient Americans reduce to two distinct types
--the Dolicocephalous or long-skulled, and the Brachycephalous or
short-skulled. Morton names these types respectively the Toltecan and
the American proper. The Toltecan type was represented by the primitive
inhabitants of Mexico and by the Mound-builders of our Mississippi
Valley; the American proper, by the Indians. The Toltecans made far the
closer approach to civilization, though the others possessed a much
greater susceptibility therefor than the modern Indians of our prairies
would indicate.

Of the Mound-builders painfully little is known. Many of their mounds
still remain, not less mysterious or interesting than the pyramids of
Egypt, perhaps almost equally ancient. The skeletons exhumed from them
often fly into dust as soon as exposed to air, a rare occurrence with
the oldest bones found in Europe. On the parapet-crest of the Old Fort
at Newark, 0., trees certainly five hundred years old have been cut, and
they could not have begun their growth till long after the earth-works
had been deserted. In some mounds, equally aged trees root in the
decayed trunks of a still anterior growth.

Much uncertainty continues to shroud the design of these mounds. Some
were for military defence, others for burial places, others for lookout
stations, others apparently for religious uses. Still others, it is
supposed, formed parts of human dwellings. That they proceeded from
intelligence and reflection is clear. Usually, whether they are squares
or circles, their construction betrays nice, mathematical exactness,
unattainable save by the use of instruments. Many constitute
effigies--of birds, fishes, quadrupeds, men. In Wisconsin is a mound 135
feet long and well proportioned, much resembling an elephant; in Adams
County, 0., a graceful