1968. Third Edition. 594 pages. No dust jacket. Green cloth with gilt lettering. Visible creasing to front and rear board. Minor tanning to pages, pastedowns and free endpapers. More prominent foxing and tanning to text block edges. Heavy annotations, underlining and marginalia in pencil and pen throughout; text remains unaffected. Binding remains firm. Boards have minor corner bumping and edgewear with mild sunning, rubbing and scuffing overall. Spine has light sunning with soft crushing to ends. Book has a slight forward lean. Lettering remains bright and clear.