1924. 192 pages. Signed by the author. Brown dust jacket over red cloth. Author dedication signature. Contains a folded black and white graph. Pages are moderately tanned with noticeable foxing throughout. Cracks to hinges, exposing netting. Slight crinkling to paper at gutters, however binding remains firm. Inscribed by a previous owner. Front free endpaper removed. Thumb-marking present throughout. Boards have slight edge wear with corner bumping. Visible tanning to spine and edges with some crushing to spine ends. Small area of discoloration to front board. Book is slightly bowed and forward leaning. Unclipped jacket. Panels have heavy edge wear with chips, tears and creasing. Substantial area of loss to edges. Brown marks overall.