[28] Haskins (1911) p. 491, who has, however, himself done much to clear up this obscurity. I largely follow his account in the ensuing biographical and bibliographical details.
[29] But the passage giving this date has been found in but one MS; Suter (1914), pp. 5, 37.
[30] R. L. Poole, The Exchequer in the Twelfth Century, London, 1912, p. 56.
[31] CU McLean 165, “Heynrice cum sis regis nepos”; Haskins (1913) pp. 515-6.
[32] Namely, the translation of Euclid, De eodem et diverso, and Liber Ezich.
[33] Ed. Boncompagni, Bullettino di Bibliografia e di Storia della Scienze matematiche, XIV, 1-134.
[34] Unless indirectly through Gerbert.
[35] The numerous MSS vary so in text and arrangement that it is not clear whether Adelard’s work in its original form “was an abridgement, a close translation, or a commentary,” (Haskins (1911) 494-5).
Professor David Eugene Smith states in his forthcoming edition of Roger Bacon’s Communia Mathematicae, which he has very kindly permitted me to see in manuscript, that Roger refers several times to Adelard’s Editio specialis super Elementa Euclidis—“a work now entirely unknown.”
[36] Liber ysagogarum Alchorismi in artem astronomicam a magistro A. compositus: Haskins (1911) p. 493 for MSS.