1930. Sixth Edition. 304 pages. Blue dust jacket over blue cloth. Contains black and white plates throughout. Pages are moderately tanned and foxed throughout. Thumb-marking present. Water staining to pages throughout. Brown marks throughout. Visible creasing to gutter. Binding remains firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Soft crushing to spine ends. Light tanning to spine and edges. Dents to edges. Unclipped jacket has moderate edgewear with chips, tears and creasing. Loss to spine ends. Visible tanning to spine. Brown staining to panels.