These hail-stones were flat, and one was ten inches in circumference, and another weighed two ounces.
They ploughed up a gravel-walk like musket-balls, and passed through glass-windows, making round holes, but not cracking them.
Having finished our dinner of hail-stricken meat, we crossed the Sierra Tapalguen; a low range of hills, a few hundred feet in height, which commences at Cape Corrientes.

The rock in this part is pure quartz; farther eastward I understand it is granitic.

The hills are of a remarkable form; they consist of flat patches of table-land, surrounded by low perpendicular cliffs, like the outliers of a sedimentary deposit.

The hill which I ascended was very small, not above a couple of hundred yards in diameter; but I saw others larger.

One which goes by the name of the "Corral," is said to be two or three miles in diameter, and encompassed by perpendicular cliffs between thirty and forty feet high, excepting at one spot, where the entrance lies.