1951. Reprint of First Edition. 604 pages. Illustrated dust jacket over blue cloth with gilt. Thirty-one plates in half-tone and many line illustrations in the text. Binding remains firm. Pages and plates remain bright and clear. Foxing to free-end papers and text-block edges. Previous owner's inscriptions to front free end-paper. Boards have mild edge-wear with slight rubbing to surfaces. Gilt lettering is darkened. Unclipped jacket has heavy edge-wear with some areas of loss, heavy tears, chips and creasing.