Environmentalists & Naturalists

Michelangelo and the Popes

The Autobiography of Charles Darwin

Ada Lovelace: The Mother of Computing

On Grandfather's Farm

Henry D. Thoreau

Scottish Reminiscences

Adopting an Abandoned Farm

Humboldt

Letters of Alexander von Humboldt to Varnhagen von Ense

My Boyhood

William Hamilton Gibson: artist—naturalist—author

Life of a Scotch Naturalist: Thomas Edward, Associate of the Linnean Society