1948. Sixth Impression. 176 pages. Blue dust jacket over blue cloth. Volume IV. Pages remain bright and clear with minimal tanning and foxing. Thumb-marking present. Visible creasing to gutter. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Light crushing to spine ends. Minor marks to boards. Unclipped jacket has moderate edgewear with chips, tears and creasing. Loss to spine ends and edges. Some tanning to spine. Visible rubbing to surfaces. Scuffing to edges.