At sea, a person's eye being six feet above the surface of the water, his horizon is two miles and four-fifths distant.

In like manner, the more level the plain, the more nearly does the horizon approach within these narrow limits; and this, in my opinion, entirely destroys that grandeur which one would have imagined that a vast level plain would have possessed.
(PLATE 31.

TOXODON PLATENSIS.

(FOUND AT SALADILLO.)) OCTOBER 1, 1833.
We started by moonlight and arrived at the Rio Tercero by sunrise.
This river is also called the Saladillo, and it deserves the name, for the water is brackish.

I stayed here the greater part of the day, searching for fossil bones.