Francis Galton, credited with the discovery of identification by fingerprinting, also took a long term interest in the study of biometrics. In this book, many different faculties, both observable and measurable are discussed in length and methods of collecting data suggested. In addition, casual observations from personal memoirs, and drawing similar cases from other reputable sources are also compared. A wide variety of topics are mentioned, including differences in appearance within family members, to subtle habits and emotional responses comparing humans and animals are mentioned in a series of chapter length essays. - Summary by Leon Harvey