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This is CBS I On The World.

Here's John Batchler.

Continuing with Professor Dan Flores, his new book is Wild New World,

the epic story of animals and people in America, Henry David Thoreau.

Certainly a man celebrated for his literary skill and his observation talents.

Wrote very carefully, this is the 19th century.

When I consider that the nobler animals have been exterminated here,

the Cougar Panther, Lynx, Wolverine, Wolf Bear, most deer, the beaver, the turkey,

I cannot but feel as if I have lived in a tamed and as it were a masculated country.

I take infinite pains to know all the phenomena of the spring, thinking that I have

heard the entire poem and then to Masha Grin, I hear that it is but an imperfect copy

that I possess and have read that my ancestors have torn out many of the first leaves

and grandest passages and mutilated in many places.

I read that aloud, Professor, because it's extremely sad and very accurate.

In your telling, you fill in the parts that Henry David Thoreau moves quickly past

...