1962. Last Reprint. 142 pages. No dust jacket. Signed by the author. Green cloth boards. Contains colour photographic plates, and in-text black and white diagrams and photographs. Signed by the author with dedication to front free endpaper. Pages and plates are bright and clear with minimal tanning and foxing. Binding remains firm. Boards have mild edge wear with slight rubbing to surfaces and bumping to corners. Minor sunning to spine and edges. Slight crushing to spine ends. Occasional water staining and small brown stain to rear board. Book has a slight forward lean.