[2214] Opus Tert., cap. 26, Brewer, 99. “Si vero fiunt secundum species et conditiones dictas, tunc sunt philosophica et sapientis incantantis sapienter; ut recitat David propheta.”
[2215] Epistola de secretis operibus, cap. 3, Brewer, 531. “Et ideo valde caute in his sentiendum est; nam de facili potest homo errare, et multi errant in utramque partem; quia aliqui omnem operationem negant, et alii superfluunt, et ad magica declinant.”
[2216] Steele (1920), p. 8.
[2217] Little, Part of the Opus Tertium (1912), 17-18: “Et ideo si ecclesia de studio ordinaret, possent homines boni et sancti laborare in hujusmodi scientiis magicis auctoritate summi pontificis speciali.”
[2218] Bridges, I, 111: “Omne enim efficiens agit per suam virtutem quam facit in materiam subjectam, ut lux solis facit suam virtutem in aere, quae est lumen diffusum per totum mundum a luce solari. Et haec virtus vocatur similitudo, et imago, et species, et multis nominibus, et hanc facit tam substantia quam accidens, et tam spiritualis quam corporalis. Et substantia plus quam accidens, et spiritualis plus quam corporalis. Et haec species facit omnem operationem hujus mundi; nam operatur in sensum, in intellectum, et in totam mundi materiam pro rerum generatione.”
[2219] An interesting instance of its survival in the fifteenth century and of the fact that Roger Bacon was not the only medieval clergyman interested in astrological medicine, is provided by the treatise of an archdeacon of Parma and doctor of medicine on “The domination and projection of rays,” preserved in a Wolfenbüttel MS: 2816, fols. 186-200, “Explicit tractatus de denominatione et proiectione radiorum magistri Mattaei de Guarimbertis de Parma, archydiaconi Parmensis, artium et medicine doctoris, egregie, finitus in Burgo in Brecya in domo magistri Petri Herlensis, in artibus et medicina eximii professoris, anno Domini 1461 incompleto ante carnisprivium per me Jacobum de Huerne.”
[2220] William’s writings exist in manuscript in the Bibliothèque Nationale, and are described HL 25: 64 ff.
[2221] Opus Tertium, cap. 9 (Brewer, 27); Bridges, I, 239 and note, giving passages from Bacon’s unpublished writings, also I, 240 and 247. Steele (1920), pp. viii, 3.
[2222] Opus Tertium, caps. 9, 30 (Brewer, 27, 106); Bridges, I, 109, 242 note.
[2223] Bridges, I, 241.