1961. Thirteenth Edition. 274 pages. No dust jacket. Blue cloth boards with gilt lettering. Expected library inserts, stamps and inscriptions. Clean pages with light tanning and mild foxing throughout. Moderate tape marks to front pastedown. 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.