1956. 4th edition. 207 pages. This is an ex-Library book. Pictorial dust jacket covered in plastic wrapper over blue cloth. Expected library inserts, stamps and inscriptions. Moderate tanning, with light foxing and marking to pages. Moderate rub-marking and tanning to pastedowns and endpapers with inserts to front. Boards have moderate shelf wear, with rubbing and marking. Light bumping to corners and crushing to spine ends. Binding remains firm. Unclipped jacket has light edge-wear with minor tears and chipping. Moderate tanning and creasing, with rubbing and marking.