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

This book, first published in 1975, is a comprehensive list of all the books on India, written in English before 1900. It is an invaluable reference source on India of the eighteenth and nineteenth centuries. Apart from the work of professional writers, there are the writings of a cross-section of society from soldiers to scientists. We find dictionaries of obscure dialects written by government officials, descriptions of their travels by visiting clerics, homely details of everyday life by housewives, as well as technical and scientific works written by scholars.

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

The history of South Asian ornithology spans three centuries and records over 1200 species of birds. This is the passionate work of hundreds of amateur and professional ornithologists. The popular as well as scientific documentation of this region s avifauna is prodigious.