This section of the book "The Expression of the Emotions in Man and Animals" by Charles Darwin, edited by his son Francis Darwin, is part of the twelfth thousandth edition. It includes photographic and other illustrations. The book discusses the expression of emotions in both humans and animals, exploring how these expressions are similar across species.This section of the book "The Expression of the Emotions in Man and Animals" by Charles Darwin, edited by his son Francis Darwin, is part of the twelfth thousandth edition. It includes photographic and other illustrations. The book discusses the expression of emotions in both humans and animals, exploring how these expressions are similar across species.