Gustave Aimard 
Freebooters: A Story of the Texan War 

Excerpt: All the wood rangers have noticed, with reference to the immense virgin forests which still cover a considerable extent of the soil of the New World, that, to the man who attempts to penetrate into one of these mysterious retreats which the hand of man has not yet deformed, and which preserve intact the sublime stamp which Deity has imprinted on them, the first steps offer almost insurmountable difficulties, which are gradually smoothed down more and more, and after a little while almost entirely disappear.