Environmental Protection

At the Sign of the Fox

Letters to a Friend, Written to Mrs. Ezra S. Carr, 1866–1879

Adventure Travel Unleashed

The Wisdom of Albert Schweitzer

Runaway Planet

Future Wild

Wakulla

In the Open: Intimate Studies and Appreciations of Nature

A Leaf from the Old Forest

Supplement to Animal Sanctuaries in Labrador

Wild Folk

Our Common Land (and Other Short Essays)

Nature's Teachings: Human Invention Anticipated by Nature

The Rocky Mountain Wonderland

The Rocky Mountain Wonderland

A Bird-Lover in the West

The Gamekeeper at Home

The Grizzly, Our Greatest Wild Animal

A Northern Countryside

The Flower-Fields of Alpine Switzerland: An Appreciation and a Plea