This volume is part of the definitive edition of letters written by and to Charles Darwin, the most celebrated naturalist of the nineteenth century. Notes and appendixes put these fascinating and wide-ranging letters in context, making the letters accessible to both scholars and general readers. Darwin depended on correspondence to collect data from all over the world, and to discuss his emerging ideas with scientific colleagues, many of whom he never met in person. The letters are published chronologically: volume 24 includes letters from 1876, the year in which Darwin published Cross and Self Fertilisation in the Vegetable Kingdom, and started writing Forms of Flowers. In 1876, Darwin's daughter-in-law, Amy, died shortly after giving birth to a son, Bernard Darwin, an event that devastated the family. The volume includes a supplement of 182 letters from earlier years, including a newly discovered collection of letters from William Darwin, Darwin's eldest son.

During 1867 Darwin intensified lines of research on human expression and sexual selection.

The year leading up to the publication of Descent of Man, Darwin's first treatment of human evolution.

This volume is part of the definitive edition of letters written by and to Charles Darwin, the most celebrated naturalist of the nineteenth century. Notes and appendixes put these fascinating and wide-ranging letters in context, making the letters accessible to both scholars and general readers. Darwin depended on correspondence to collect data from all over the world, and to discuss his emerging ideas with scientific colleagues, many of whom he never met in person. The letters are published chronologically. In 1881, Darwin published his final book, The Formation of Vegetable Mould through the Action of Worms. He reflected on reactions to his previous book, The Power of Movement in Plants, and worked on two papers for the Linnean Society on the action of carbonate of ammonia on plants. In this year, Darwin's elder brother, Erasmus, died, and a second grandchild, also named Erasmus, was born.

This volume is part of the definitive edition of letters written by and to Charles Darwin, the most celebrated naturalist of the nineteenth century. Notes and appendixes put these fascinating and wide-ranging letters in context, making the letters accessible to both scholars and general readers. Darwin depended on correspondence to collect data from all over the world, and to discuss his emerging ideas with scientific colleagues, many of whom he never met in person. The letters are published chronologically. Darwin died in April 1882, but was active in science almost up until the end, raising new research questions and responding to letters about his last book, on earthworms. The volume also contains a supplement of nearly 400 letters written between 1831 and 1880, many of which have never been published before.

This volume is part of the definitive edition of letters written by and to Charles Darwin, the most celebrated naturalist of the nineteenth century. Notes and appendixes put these fascinating and wide-ranging letters in context, making the letters accessible to both scholars and general readers. Darwin depended on correspondence to collect data from all over the world and to discuss his emerging ideas with scientific colleagues, many of whom he never met in person. The letters are published chronologically: volume 20 includes letters from 1872, the year in which The Expression of the Emotions in Man and Animals was published, making ground-breaking use of photography. Also in this year, the sixth and final edition of On the Origin of Species was published and Darwin resumed his work on carnivorous plants and plant movement, finding unexpected similarities between the plant and animal kingdoms.