1937. Sixth Edition. 237 pages. Black and yellow jacket over yellow cloth. Contains black and white photographic frontispiece, with other plates throughout. Pages are mildly tanned and foxed, but text remains clear. Plates are brighter. Binding is firm. Price inscription to front free endpaper. Boards and spine have minimal shelf-wear, with mild corner bumping and crushing to ends. Noticeable dark marking overall. Unclipped jacket. Moderate tanning to spine, edges and joints. Panels have light edgewear, with small tears, chips and creases, heavier to spine ends. Label to rear panel.