1964. Fifth Edition Revised. 644 pages. No dust jacket. Green cloth boards with gilt lettering. Clean pages with light tanning and mild foxing throughout. Pen inscription to front free endpaper. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Gilt lettering is darkened. Moderate sunning to spine and edges with crushing to spine ends. Minor splits to spine ends and corners causing cloth to be frayed. Minor wear marks to boards.