Large octavo hardcover, no dust-jacket as issued. 515 pages. Full concordance followed by three appendices: 1. List of suppressed words and their frequencies; 2. List of keywords and their frequencies; 3. List of typographic errors in text, silently corrected. First American edition. An invaluable aid to the student, researcher or scholar investigating Darwin’s writings. No previous ownership marks. A clean, square, fresh and unused copy, like new. Fine.