1946. Fourth Edition. 176 pages. Illustrated dust jacket over red paper covered boards. Pages remain clear with minimal tanning and foxing. End papers are more notably tanned. Minor pencil marking to front free end-paper. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Mild crushing to spine ends. Book has a slight forward lean. Unclipped jacket has light edge-wear with tears and creasing.