Oxford: At the Clarendon Press, 1952. First editon, 8vo.,pp. 160, navy cloth, gilt; toning to endpapers, off setting to front and rear free endpapers and toning to margins, occasional light pencilling to margins, otherwise very good, in an unclipped dust-jacket, which is toned and rubbed to spine and extremities, with wear to corners.

London: Archibald Constable & Co. Ltd, 1908. 8vo., pp.xvi,348,(8)adverts, green cloth, gilt, b/w plates and figures, including folding plate; front free endpaper cropped, with owner’s handwritten catalogue number to half title, upper corner of front board bumped, else very good.

London: Simpkin And Marshall, 1856. Small 8vo.,pp. 59, brown cloth, gilt lettering to front board, monochrome frontispiece; light toning to margins, soiling and scuff mark to front paste down endpaper, rubbed and toned to extremities, webbing becoming slightly visible to inner hinge, otherwise very good. No dust-jacket.

London: J.M. Dent and Sons, 1987. 8vo., pp.vii,208, black hardcover, gilt, b/w figures; light marking to front board, a very good copy, in vg unclipped dust-jacket.

New York: George H. Doran Company, 1926. First US edition, pocket 8vo., pp.45, turquoise cloth, navy lettering; light toning to endpapers, very light foxing to prelims and edges, not affecting margins, otherwise internally clean, a very good copy in clipped dust-jacket, which s worn to extremities, with closed tears, chipping, and small areas of loss - now in a protective cover.

London: Methuen & Co. Ltd, 1920. Second English edition, 8vo., publisher’s red cloth, gilt, pp.xiii,(3),138,(2),8(adverts), frontispiece portrait;neat signature to front free endpaper, light foxing to fore-edges and prelims, otherwise a very attractive, bright, clean copy.

Oxford: Oxford University Press, 1935. 8vo.,pp. viii,365, dark green cloth, gilt, b/w figures, b/w frontispiece; ownership inscription to front free endpaper, light toning to margins, light sunning to spine and light rubbing to extremities, a very good copy. No dust-jacket.

London: William Pickering, 1994. 8vo.,pp. cvii,188, navy cloth, red title band and gilt lettering to spine, b/w illustrations, b/w frontispiece; a very good copy. No dust-jacket.

London: Institution of Electrical Engineers, 2001. 8vo.,pp. xvii,235, pictorial hardcover, b/w figures and tables; lightly rubbed to extremities, a very good copy. No dust-jacket.

Cambridge University Press, 1995. Reprints of the corrected editions, two volumes, 8vo., pp.x,458;ix,501, paperback; light creasing to spine of Volume 2, light toning to edges, a very good, fresh set.

Princeton University Press, 1985. 8vo., pp.xvi,347, purple cloth with stamped title label to spine; ownership bookplate to front paste-down endpaper, a very good copy indeed, without dust-jacket.

London: Published under the direction of the Royal Society of Literature of the United Kingdom by Humphrey Milford, Oxford University Press, 1913. 8vo., pp.clxxviii,614;xxv,804 red cloth, gilt; light rubbing to extremities, very good indeed, in unclipped dust-jackets, which are lightly worn to extremities, with possible light worming to front lower margin of jacket to Volume I, and with foxing/mottling to spines - now in protective covers and otherwise very good.

Cambridge University Press, 1996. 8vo., pp.xiv,295, hardcover with stamped title label in blue, gilt; slight tone to edges, a couple of small bumps to edges of boards, else clean and very good indeed, in unclipped dust-jacket, which has cm closed tear to front upper edge, small nick to headband, and removed sticker to rear of jacket, else vg.

Cambridge: Cambridge University Press, 2019. 8vo.,pp. xiv,361, pictorial hardcover, b/w and colour figures; a near-fine copy. No dust-jacket, as issued.

Los Angeles/London: Center for Medieval and Renaissance Studies, University of California, 1975. 8vo., pp.xvi,405, blue cloth lettered in silver; a very good, clean copy, in good(+) unclipped dust-jacket, which is worn and torn to extremities, and now in a protective cover.

Berkeley/Los Angeles/London: Published under the auspices of the Center for Medieval and Renaissance Studies, University of California, 1975. 8vo., pp.xvi,405, blue cloth lettered in silver; a very good, clean copy, in unclipped dust-jacket which is rubbed and with closed tears to edges - now in protective cover.

London: The Louis Cassier Co, 1899. Fifth edition, large 8vo., pp.(vi),162-384, green cloth, gilt, pictorial title, numerous b/w illustrations and figures; foxing and small tear to cloth at head and foot of spine, light rubbing to extremities, a very good copy.

Cambridge: Cambridge University Press, 2004. 8vo.,pp. xii,348, paperback, b/w figures; lightly sunned to spine, a very good copy.

Published for The Early English Text Society by the Oxford University Press, 1984. 8vo., pp.xc,403, brown cloth, gilt, b/w frontispiece, 3 further b/w plates; small knock to lower edge of front board, slight roll to spine, internally fresh and fine, overall a very good copy indeed.

Oxford: At the Clarendon Press, 1947. 8vo.,pp. xii,311, green cloth, gilt; toned to margins, pencil annotation to front free endpaper and occasionally to margins, sunning to spine and lightly rubbed to extremities, a very good copy. No dust-jacket.