1948. 4th Edition. 454 pages. Blue dust jacket with lettering over burgundy cloth. Contains black and white illustrations. Heavy tanning and foxing to pages and text block edges. Cracks to guttering throughout, with exposed binding thread. Mild tanning and marking to pastedowns and front endpaper. Rear endpaper is missing. Boards have moderate shelf wear, with rubbing and marking. Moderate bumping to corners and crushing to spine ends. Book has noticeable forward lean. Unclipped jacket with heavy edge wear, large tears and chipping, causing loss around edges and spine. Moderate tanning and creasing, with rubbing and marking.