1950. Third Edition, Revised. 296 pages. Grey illustrated dust jacket over blue cloth boards with gilt lettering to spine. Black and white illustrations, illustrative plates and photographic plates throughout. Fold out element to mis-section. Binding remains firm. Crinkling to pages at gutters. Pages remain bright and clear with minimal tanning. Title page and preface are loose but still present. Boards have mild edge wear with slight rubbing to surfaces. Crushing to spine ends. Tanning to spine and edges. Gilt lettering is bright and clear. Book has a slight forward lean. Clipped jacket has light edge wear with minor tears and chipping. Mild rubbing and marking. Tanning to spine and edges causing discolouration.