1951. Third Edition. 55 pages. Blue dust jacket over blue cloth. Pages are lightly tanned and foxed throughout, slightly heavier to endpapers and pastedowns. Light thumb-marking present. Binding remains firm. Boards have mild edge wear with slight rubbing to surfaces. Soft crushing to spine ends. Light foxing and tanning to spine. Unclipped jacket has moderate edge wear with chips, tears and creasing. Moderate sunning to spine and edges. Minor dark marking to front panel.