1960. Twelfth edition. 323 pages. Pictorial dust jacket over pictorial cloth covered boards. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. Minor inscriptions to front endpapers. Boards have mild shelf wear with light rubbing and corner bumping. Some mild marking and tanning. Clipped jacket has light edge wear with minor tears, chipping and creasing. Some tanning and foxing to all surfaces, particularly to spine.