1964. 12th Printing. 191 pages. Illustrated paper cover with lettering. X239 edition with 3'6 price on front cover. Clean pages with noticeable tanning and foxing throughout. Pen markings to first page textblock and reverse back cover. Binding remains firm. Paper covers have moderate edge-wear with slight rubbing to surfaces and curling to corners. Lettering is bright and clear. Moderate splits to spine ends and corners. Visible wear marks to covers.