No edition stated. 32 pages. Illustrated jacket over green cloth. In consultation with J E Tomkinson. Includes illustrated plates. Includes various diagrams. Pages have slight foxing, tanning and minor thumbing. Previous owner's inscription to front endpaper. Endpapers have strips of tanning caused by jacket. Foxing more intense towards the start and end of the book. Boards have some moderate edge wear, with slight bumping to corners and minor bumping to spine ends. Boards very foxed overall. Unclipped jacket has some edgewear with chips, tears and creasing. Jacket is rather rubbed and marked overall. Mild insect nibbling to rear. Jacket heavily foxed overall.