1949. Fourth Edition. 142 pages. Illustrated dust jacket over blue cloth boards with lettering. Contains black and white illustrations and plates. Clean pages, plates and illustrations with light tanning and mild foxing throughout. More pronounced to free endpapers and pastedowns. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Lettering is bright and clear. Minor wear marks to boards. Unclipped jacket. Panels and spine have light edgewear with tears and creases. Visible wear marks to spine and panels.