Birds and All Nature, Vol. V, No 5, May 1899 - Various

Birds, Vol. I, No 3, March 1897 - Various

Moths of the Limberlost - Gene STRATTON-PORTER

Minstrel Weather - Marian STORM

Birds and Nature, Vol. IX, No 3, March 1901 - Various

Trees Every Child Should Know - Julia Ellen Rogers

Our National Parks - John Muir

Pearls - William John DAKIN

The Grand Cañon of the Colorado - John Muir

Nature and Art, Vol. VIII, No 1, June 1900 - Various

Birds and All Nature, Vol. VII, No 4, April 1900 - Various

The Night The Mountain Fell; The Story Of The Montana-Yellowstone Earthquake - Edmund Christopherson

The Natural History Volume 2 - Pliny the Elder

Winter (Stevenson) - Robert Louis Stevenson

Birds, Vol. I, No 5, May 1897 - Various

Snow-Flakes - Henry Wadsworth Longfellow

Freckles - Gene STRATTON-PORTER

Physics - Aristotle

Woodcraft - NESSMUK

Ten Common Trees - Susan STOKES

Birds and Nature, Vol. VIII, No 4, November 1900 - Various

Treatise on Light - Christiaan Huygens

Birds and Nature, Vol. IX, No 4, April 1901 - Various

Opticks - Sir Isaac NEWTON

The Natural History Volume 7 - Pliny the Elder

Birds and All Nature, Vol. VI, No 1, June 1899 - Various

Idylls Of The Sea And Other Marine Sketches - Frank Thomas Bullen

The Yosemite - John Muir

Birds, Vol. I, No 4, April 1897 - Various

The River Duddon: A Series of Sonnets - William Wordsworth