London: James Clarke & Co, 1957. First English edition, 8vo.,pp. 252, dark green cloth, purple title band to spine with gilt lettering; ownership autograph to front paste down endpaper, with ownership blind stamp to front free endpaper, toned and foxed to edges of text block with minor toning and foxing to margins, title page and endpapers, light rubbing to extremities, a good+ copy, in a good+ unclipped dust-jacket, which is rubbed and toned to spine and extremities, with water staining to rear lower corner.

Donington: Shaun Tyas, 2006. 8vo.,pp. xi,420, terracotta cloth, gilt, b/w illustrations; ownership pictorial ink stamp to front paste down endpaper, slight water mark to lower margin of front board, a very good copy, in a very good unclipped pictorial dust-jacket.

Cambridge: Cambridge University Press, 1992. 8vo., pp.xiii,268, hardcover, gilt; ownership bookplate to front paste down endpaper, light foxing to upper edge of text block, otherwise a very good copy, in a very good unclipped pictorial dust-jacket.

London: Longmans, Green,and Co. Two volumes,.8vo., pp.ix,119;xx,75, uncut, black bevelled cloth, gilt, t..e.g., ribbon bookmarks, 2 b/w plates; small engraved heraldic bookplate to front paste-down endpaper (both volumes), pale foxing to prelims, rubbing to extremities, else very good.

Woodbridge: The Boydell Press, 2000. 8vo.,pp. clx,892, green hardcover, with paper title label to front board, gilt, lettering to spine; ownership bookplate to front paste down endpaper, light sunning to spine, a very good, clean copy. No dust-jacket.

Toronto: Pontifical Institute of Mediaeval Studies, 2014. 8vo., pp.xiv,197, grey cloth, gilt; ownership bookplate to front paste-down, otherwise internally clean and fresh, a fine copy in a near fine unclipped dust-jacket.

London/New York: Routledge, 2000. 8vo., pp.xii,194, hardcover, 10 b/w illustrations; neat ownership nameplate to front paste-down endpaper, slight rubbing to extremities, internally fresh, a very good copy indeed. No dust-jacket, as issued.