On the edge of this field he discovered a tusk six feet eight inches long and twenty-six inches at its widest circumference, and having almost the curve of a circle.

It was not petrified and had no bone core, but the hole filled in with clay, and its colour was a rich mahogany.

It was undoubtedly the tusk of a mammoth.
From the beginning it had surprised me how very ignorant the people of Sonora were regarding the Sierra Madre.

The most prominent man in Opoto, a town hardly forty miles from the sierra, told me that he did not know how far it was to the sierra, nor was he able to say exactly where it was.

Not even at Nacori, so close to this tremendous mountain range, was there much information to be gotten about it.