Environmental Protection

The Rocky Mountain Wonderland

A Pictorial Guide to Mesa Verde National Park

Mooswa & Others of the Boundaries

Pearls and Pebbles; or, Notes of an Old Naturalist

Islands and Communities

Flashlights on Nature

Nature's invitation: Notes of a bird-gazer, North and South

By the Marshes of Minas

A Short Account of the Botany of Poole

The Stewardship of the Soil

Tales of a Vanishing River

At the Sign of the Fox

Wood Wanderings

3000 Miles in the Great Smokies

Tinicum & Eastwick

Literary Pilgrimages of a Naturalist

The Grail Bird

My First Summer in the Sierra (With Original Drawings & Photographs)

Morag the Seal

Pearls and Pebbles; or, Notes of an Old Naturalist