1963. Twenty-Third Impression. 351 pages. Dust jacket over green cloth. Book is in better condition than most examples of this age. Neat, clean, well bound pages with very minimal foxing, tanning and thumbing. Small inscriptions and neat labels may be present. Boards have mild shelf wear with light rubbing and corner bumping. Some light marking and sunning. Clipped jacket has moderate edgewear with chips, tears, and creasing. Mild water staining present. Moderate tanning to spine. Mild rubbing and marking all over.