ng, by two hundred and ten feet average width. The earth was thrown
out on either side, forming embankments. From the left hand embankments,
passing up to the third terrace, there could formerly be traced a low
embankment running for fifteen hundred feet, and connected with mounds
and other walls at its extremity.

Some have supposed that formerly the river flowed at the extremity of
this graded way, and a passage way to the water was thus furnished.
Squier says, in this connection: "It is sufficient to observe that the
river now flows half a mile to the left, and that two terraces, each
twenty feet in height, intervene between the present and the supposed
ancient level of the stream. To assent to this suggestion, would be
to admit an almost immeasurable antiquity to the structure under
consideration." The casual observer would say that it was intended to
afford an ascent from one terrace to the other. But as the height was
only seventeen feet, we can not see why it was so necessary to have a
long passage way of easy grade from one terrace to the other. It was
evidently built in connection with the obliterated works on the third
terrace. This interesting remain is now utilized as a turnpike, and
the passing traveler but little recks he is going over one of the most
ancient causeways in the land. It may be that ceremonious processions,
with stately tread, utilized this causeway in years long since elapsed.
Speculation, always an unsafe guide to follow, is especially so in
this case, and so we leave this memento of a vanished people as much an
enigma to us as to its first explorers.

We have described but a few of the sacred inclosures of Ohio, but enough
have been given to give us a fair idea of all. We wish now to call
attention to another class of remains. We have seen how the works we
have been describing are lacking in defensive qualities. This becomes
more marked, when we learn there are works, beyond a doubt, defensive in
character, in which advantage is taken of all circumstances which
would render the chosen retreat more secure. In the first place, strong
natural positions were selected. They chose for their purpose bluffy
headlands leading out into the river plain. A people surrounded by
enemies, or pressed by invaders, would naturally turn their attention to
such heights as places susceptible of defense. Accordingly, it does
not surprise us to find many heights occupied by strong and complicated
works. General