First Edition, later state. Hardcover. Previously owned by Oliver Sacks. This is the first edition of Darwin's well-known work on animal behavior and communication theory. Darwin studied the movement of facial muscles and how they express emotion in man and animals. The heliotype photo plates are works of art and demonstrate a new breakthrough in Victorian photography. From the library of Dr. Oliver Sacks, the renowned neurologist, author, and educator. He was, in his life, celebrated for his contributions to the understanding of the human brain and his ability to communicate complex scientific concepts to a broader audience. In doing so, he highlighted the profound impact of neurological disorders on human identity and experience. His library is a reflection of this remarkable polymath's questing mind. Craking and splitting hinge, mostly intact, moderate shelf/edge wear, rubbing to boards, toning, else tight, bright, and unmarred. Bound in quarter calf with marbled boards, gilt titles, marbled edges and endpapers. 8vo.vi, 374, [4] pp. illus. (b/w, with 7 heliotype plates (3 folding) and 19 text-figures) Lacking publisher's advertisements dated November 1872.