This volume investigates the personal motivations, intellectual development, and professional legacies of Charles Darwin and T.H. Huxley through their own retrospective accounts. Sir Gavin de Beer, a noted biologist and historian of science, curates these memoirs to provide a comparative look at how these two figures navigated the scientific landscape of the nineteenth century. The text serves as a primary source analysis, contextualizing the personal reflections of the architects of evolutionary theory within the broader history of scientific thought.

Scholars and historians of science frequently cite this collection as a useful, concise entry point for understanding the personal dynamics between Darwin and his most vocal proponent. Readers often note that the text provides a humanizing perspective on the figures behind the development of modern evolutionary biology.