Something will have gone out of us as a people if we ever let the remaining wilderness be destroyed; if we permit the last virgin forests to be turned into comic books and plastic cigarette cases; if we drive the few remaining members of the wild species into zoos or to extinction; if we pollute the last clear air and dirty the last clean streams and push our paved roads through the last of the silence . . .

Expose a child to a particular environment at this susceptible time and he will perceive in the shapes of that environment until he dies.

Homesickness is a great teacher. It taught me, during an endless rainy fall, that I came from the arid lands, and like where I came from. I was used to dry clarity and sharpness in the air. I was used to horizons that either lifted into jagged ranges or rimmed the geometrical circle of the flat world. I was used to seeing a long way. I was used to earth colors--tan, rusty red, toned white--and the endless green of Iowa offended me. I was used to a sun that came up over mountains and went down behind other mountains. I missed the color and smell of sagebrush, and the sight of bare ground.

A western buckaroo, I share his scorn for people who go camping by the book, relying on the authority of some half-assed assistant scoutmaster whose total experience outdoors probably consists of two overnight hikes and a weekend in the Catskills. But we have just had that confrontation. The one who goes by Pritchard's book is Sid's wife, and I am wary. It is not my expedition. I am a guest here.

We are fossils in the making.

If the national park is, as Lord Bryce suggested, the best idea America has ever had, wilderness preservation is the highest refinement of that idea.

Every book that anyone sets out on is a voyage of discovery that may discover nothing. Any voyager may be lost at sea, like John Cabot. Nobody can teach the geography of the undiscovered. All he can do is encourge the will to explore, plus impress upon the inexperienced a few of the dos and don'ts of voyaging.