6th Edition. 664 pages. Half bound brown leather with brown cloth covered boards. Black and white illustrations throughout. Severe cracking to hinges causing boards and first few pages to be loose. Pages and illustrations have light tanning and foxing throughout. Pencil inscription and sticker to front pastedown and endpaper. Water staining to some pages, text remains unaffected. Boards have moderate shelf-wear with bumping to corners and rubbing to surfaces. Light sunning and chipping to leather to spine and edges with crushing to spine ends. Staining to both boards.