1961. Further Revised Edition. 370 pages. Illustrated jacket over cloth. Pages remain clear with minimal tanning and foxing. Minor pencil marking to front free end-paper. Damps staining to bottom corner of text block. Underlining appears occasionally throughout. Binding remains firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Mild crushing to spine ends. Gilt lettering is bright and clear. Book has a slight forward lean. Clipped jacket has heavy edge-wear with some areas of loss, heavy tears, chips and creasing. Moderate sunning to spine.