Leiden, E.J. Brill, 1988. Paperback, 24 cm, 215 pp. "Philosophia Antiqua Vol. XLVIII". Cond.: goed / good. ISBN: 9004085386. Philosophia Antiqua Vol. XLVIII.
London, Eyre & Spottiswoode, 1970. Hardcover with dustjacket, 22 cm, 298 pp. Ills.: zwart/wit illustraties. Closed tear in dustjacket. Cond.: goed / good. ISBN: 0413269906.
London, Longmans, Green & Co, 1865. 1st edition Hardcover, 20 cm, XVIII / 308 / 32 pp. Cover with shelfwear and book block a bit loose in the cover. Water stains on the front end pages. Cond.: goed / good.