Mammals

Carlsbad Caverns National Park, New Mexico

Comparative Ecology of Pinyon Mice and Deer Mice in Mesa Verde National Park, Colorado

Man's Place in the Universe A Study of the Results of Scientific Research in Relation to the Unity or Plurality of Worlds, 3rd Edition

The Kangaroo Hunters; Or, Adventures in the Bush

Mammals of Mount Rainier National Park

The Great Horse; or, The War Horse

Rataplan, a Rogue Elephant; and Other Stories

The Dolphin in History

Cactus Forest Drive, Saguaro National Monument

Wild Animals of the Rockies. With a List of Mammals found in Rocky Mountain National Park

The Geologic Story of Palo Duro Canyon

The Botanical Lore of the California Indians with Side Lights on Historical Incidents in California

Orangutan Rescue

The Wild Elephant and the Method of Capturing and Taming it in Ceylon

Animal Life of the British Isles

Animal Intelligence

Barium: A Cause of the Loco-Weed Disease

“The One” Dog and “The Others”: A Study of Canine Character

“Wee Tim'rous Beasties”: Studies of Animal life and Character

The Book of the Otter: A manual for sportsmen and naturalists