1946. 7th Edition. 387 pages. Grey dust jacket over green cloth. Black and white illustrated frontispiece. Binding remains firm. Pages have light tanning and foxing throughout. Boards have light shelf-wear with corner bumping. Slight crushing to spine ends. Dent to bottom edge of front board. Unclipped jacket has heavy edgewear with areas of loss, heavy tears, chips, and creasing. Light tanning to spine and edges.