Environmental Protection

Nature's Teachings: Human Invention Anticipated by Nature

Our Common Land (and Other Short Essays)

On Naval Timber and Arboriculture

A Bird-Lover in the West

Pearls and Pebbles; or, Notes of an Old Naturalist

Nature Near London

Cottontail Rabbits in Relation to Trees and Farm Crops

The Rocky Mountain Wonderland

The Rocky Mountain Wonderland

The House of the Trees & Other Poems

The Arctic Circle

Islands and Communities

Tinicum & Eastwick

Beaches World Wide