1952. Third Revised Edition. 192 pages. No dust jacket. Red cloth covered boards. Contains in-text monochromatic illustrations throughout. Pages remain clear with minimal tanning and foxing. Minor pencil marking to front free end-paper. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Mild crushing to spine ends. Book has a slight forward lean. Top edge of text block is dust marked. Minor white marks to front board. Further marks to rear board.