The work appeared between 1859 and 1868 in 520 weekly parts at three-halfpence each[1] and totalled ten octavo volumes, with 8,320 pages, and over 27,000 articles from over 100 authors.[2]. Over 250 authors were traced by Professor Cooney in 1999 (Cooney, Sondra Miley. ``A Catalogue of Chambers's Encyclopaedia, 1868.' Bibliotheck: A Scottish Journal of Bibliography and Book History.