trace a continuous line of ruins from the San Juan
Valley to that of the Ohio, granting the migration to have taken place,
because a migrating race would not be apt to erect monuments until they
reached the end of their line of migration. Those who take this view of
it say that it is not at all strange that when these migrating
tribes reached their new homes in the Mississippi Valley they erected
structures differing from those they had formerly built, because all
their surroundings would be different, and in the prairie sections they
would find neither stone for building their pueblos nor clay suitable
for adobe construction. So they would do the next best thing, and build
a fortified village. This is the view of that eminent scholar, Mr.
Morgan. It must be borne in mind, however, that the fortified villages
of the southern Indians, including those of the Mississippi Valley,
corresponded more nearly with those of the Atlantic shore, and more
northern tribes, than with the pueblo structures.

There is another line of proof which we think has been read the wrong
way, or, at least, applied too strongly, and made to do service in
proving that the Mound Builders migrated from the valley of the Ohio
to Mexico, and there laid the foundation of that wonderful civilization
which is yet a riddle to the antiquarian.<56> This is derived from a
study of the skulls procured from various sections of this country,
Peru, and Mexico. It is sufficient to state that anatomists have made
a careful study of the skulls of individuals of various nations, and
instituted certain comparisons between them, and discoveries of great
importance have been made by this means. Now, some of our best American
scholars have insisted that the skulls of the Mound Builders and the
ancient inhabitants of Mexico and the Inca Peruvians are so similar that
they must have belonged to the same race.

This type of skull, however, is characteristic, not only of the Mound
Builders, the ancient Mexicans and the Peruvians, but of the Pueblos,
and of such tribes as the Natchez, Creeks, and Seminoles. We think, with
all due regard to the opinions of others, that in the present state
of our knowledge of craniology we are not authorized in drawing very
important conclusions therefrom. About all we are justified in stating
is that the sedentary or village Indians, whether found in North or
South America, have certain common features.

It is also hard to see any great rese