that the peoples who spoke them were descended from the same stock.
The science of languages is called Linguistics.

=Lacunæ.=--It is not to be supposed that books, monuments,
inscriptions, and languages are sufficient to give complete knowledge
of the history of antiquity. They present many details which we could
well afford to lose, but often what we care most to know escapes us.
Scholars continue to dig and to decipher; each year new discoveries of
inscriptions and monuments are made; but there remain still many gaps
in our knowledge and probably some of these will always exist.


RACES AND PEOPLES

=Anthropology.=--The men who people the earth do not possess exact
resemblances, some differing from others in stature, the form of the
limbs and the head, the features of the face, the color of the hair and
eyes. Other differences are found in language, intelligence, and
sentiments. These variations permit us to separate the inhabitants of
the earth into several groups which we call races. A _race_ is the
aggregate of those men who resemble one another and are distinguished from
all others. The common traits of a race--its characteristics--constitute
the type of the race. For example, the type of the negro race is marked
by black skin, frizzly hair, white teeth, flat nose, projecting lips, and
prominent jaw. That part of Anthropology which concerns itself with races
and their sub-divisions is called Ethnology.[3] This science is yet in
its early development on account of its complete novelty, and is very
complex since types of men are very numerous and often very difficult to
differentiate.