Life and Letters of Thomas Henry Huxley — Volume 2

Rambles of a Naturalist

Through Forest and Stream

The Quest of the Quetzal

Frank, the Young Naturalist

The Story of Scotch

The Mentor

American Naturalists, Vol. 7, Num. 9, Serial No. 181, June 15, 1919

Life and Letters of Thomas Henry Huxley — Volume 1

Alfred Russel Wallace

Letters and Reminiscences, Vol. 2

The Life and Letters of George John Romanes, M.A., LL.D., F.R.S.

Henry D. Thoreau

Letters to a Friend, Written to Mrs. Ezra S. Carr, 1866-1879

Audubon and His Journals, Volume 2 (of 2)

John James Audubon

My Boyhood

Nat the Naturalist

A Boy's Adventures in the Eastern Seas

Life and Letters of Thomas Henry Huxley — Volume 3