Environmental Protection

Masters of the Wilderness

Trees of Indiana

Trails and Tramps in Alaska and Newfoundland

From North Pole to Equator: Studies of Wild Life and Scenes in Many Lands

Our National Forests

Outdoor pastimes of an American hunter

A Traveller in Little Things

Hampshire Days

Letters from Australia

Glacier National Park

The Web of Life

Getting Acquainted with the Trees

Woodland Gleanings: Being an Account of British Forest-Trees

The Wilderness Essays

Wild Apples

The Falls of Niagara and Other Famous Cataracts

Wild Animals of North America

The Fight for Conservation

Whitefoot the Wood Mouse

Lobo, Rag and Vixen