1923. No Edition Stated. 452 pages. No dust jacket. Signed by the author. Dark purple cloth with gilt titles to spine. Signed by author to front endpaper, with inscription "Alastair ??, with kind regards", dated June 13 1927. Includes photographic plates. Includes diagrams. Pages have slight foxing, tanning and minor thumbing. Foxing more noticeable towards the start and end of the book. Plates are clean with minor thumbing and foxing. Text block edges are a little tanned. Boards have some edge wear, with bumping and fraying to corners and crushing and fraying to spine ends. One small tear or chip to lower section of spine. Spine is noticeably sunned. Gilt is bright. Boards a little rubbed and marked overall, with faint marks. Book has a moderate forward lean.