1969. First Edition Thus. Unpaginated. Paperback books with pictorial covers. Black and white illustrations throughout with photographic plates to centre. Vols. 5-8 in one slipcase each paginated separately. Orange map in slipcase. Binding remains firm. Pages and plates are lightly tanned throughout. Paper cover has mild edgewear with curling to corners. Light tanning to spine and edges. Slipcase has moderate edge wear with markings to panels and scuffing to edges. Tears to edges. Light tanning to spine and edges.