The Descent of Man.

[Albert]

Its quite odd, since I regard myself as well read, that I missed this work. I had always assumed "The descent of Man" was a sub chapter of "The origin of species" and not a completely seperate work. No doubt the work has been supressed. Primarily on account of this chapter.
http://www.infidels.org/library/historical/charles_darwin/descent_of_man/chapter_07.html
It makes more sense that this was the work of Darwin that was burned rather than "The Origin of species."
I first discovered this book after seeing this video.
http://www.redicecreations.com/article.php?id=5609

[Grimm]

There's also a book called "The ascent of man" I read it and it was interesting.