The Expression of the Emotions in Man and Animals with his cousin Emma Wedgwood who held firm Christian beliefs. On 21 September 1838, Darwin recorded a confused and disturbing dream in which he was involved in a public execution where the corpse came to life and claimed to have faced death like a hero. In summary: Darwin put together the central features of his evolutionary theory at the same time that he was considering a scientific understanding of human behaviour and family life – and he was in some emotional turmoil. A discussion of the significance of Darwin's early notebooks can be found in Paul H. Barrett's "Metaphysics, Materialism
The Expression of the Emotions in Man and Animals the actor Henry Siddons in his "Practical Illustrations of Rhetorical Gesture and Action" (1807) and by the anatomist Robert Knox in his "Manual of Artistic Anatomy" (1852) – but abandoned them as unreliable, although the text of "The Expression" is littered with quotations from Shakespeare. Darwin opens the book with three chapters on "the general principles of expression", introducing the rather Lamarckist phrase "serviceable associated habits". With this phrase, Darwin seeks to describe the initially voluntary actions which come together to constitute the complex expressions of emotion. He then invokes a principle of "antithesis", through which opposite states of mind