1920. 6th Edition. 633 pages. No dust jacket. Brown cloth. Contains black and white illustrations. Moderate tanning, with light foxing and marking to pages. Heavy tanning to text block edges. Cracks to guttering throughout, with exposed netting. Moderate rub-marking and tanning to endpapers. Boards have moderate shelf wear, with rubbing and marking. Light bumping to corners and crushing to spine ends. Book has noticeable forward lean. Boards are slightly bowed with dents to edges.