Darwin and the mysterious Mr. X : new light on the evolutionists /

by Eiseley, Loren C. 1907-1977
Published 1979

A delicate arrangement : the strange case of Charles Darwin and Alfred Russel Wallace /

by Brackman, Arnold Charles 1923-1983
Published 1980

The autobiography of Charles Darwin 1809-1882 : with original omissions restored /

by Darwin, Charles Robert 1809-1882
Published 1969

What Darwin really said

by Farrington, Benjamín, 1891-1974
Published 1966

Darwin : a very short introduction

by Howard, Jonathan 1943
Published 2001