1965. Fourth Edition. 341 pages. No dust jacket. Blue cloth boards with gilt lettering. Clean pages with light tanning and mild foxing throughout. More pronounced to free endpapers and pastedowns. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Gilt lettering is bright and clear. Minor sunning to spine and edges with crushing to spine ends. Minor wear marks to boards.