1952. Sixth Edition. 473 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. Pen markings 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. Minor splits to spine ends and corners causing cloth to be frayed. Book has a slight forward lean. Visible wear marks to boards.