1931. Fourth edition & Reissued . Unpaginated. No dust jacket. Blue cloth. Two books bound as one. Includes colour plates. Pages remain bright and clear with minimal tanning and foxing. Heavier tanning to endpaper & pastedowns. Insert to front endpaper. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Spine has crushing to both ends. Spine is heavily tanned. Book has forward lean.