1961. Fourth Impression. 495 pages. Illustrated dust jacket over blue cloth boards. Gilt lettering. Contains black and white plates. Clean pages and plates with light tanning and mild foxing throughout. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Gilt lettering is darkened. Visible wear marks to boards. Unclipped jacket. Panels and spine have light edgewear with tears and creases. Minor tape repairs to interior jacket. Minor wear marks to spine and panels. Jacket is in removable plastic cover.