1939. Sixth Edition. 136 pages. No dust jacket. Blue paper covered boards with blue cloth spine and lettering. Contains black and white illustrations. Clean pages and illustrations with light tanning and mild foxing throughout. More pronounced to free endpapers and pastedowns. Pen inscriptions to reverse covers. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Lettering is bright and clear. Moderate sunning to spine and edges with crushing to spine ends. Minor tanning and wear marks to covers.