1953. Twenty-first Edition. 648 pages. No dust jacket. Red cloth. Part I. Noticeable staining and bleach spotting to boards. Black and white illustrations throughout. Pages and binding are presentable with no major defects. Minor issues present such as mild cracking, inscriptions, inserts, light foxing, tanning and thumb marking. Overall a good condition item. Boards have mild shelf wear with light rubbing and corner bumping. Some light marking and sunning.