Corpus Christi 95, end 12-13th century, fol. 1, Universalis Philosophiae libri tres per modum dialogi inter Normannorum ducem et ipsum doctorem. Digby 1, 14th century, fol. 1, Dragmaticon. Digby 107, 14th century, Summa magistri Wilhelmi de Conches super naturalibus questionibus et responsionibus, “Queris venerande dux....” The catalogue incorrectly speaks of it as a dialogue with Henry, duke of Normandy, afterwards Henry II of England. Bodleian (Bernard) 3565. Royal 4-A-XIII, #5, Philosophia naturalis, “Queris,” etc. Royal 12-F-X, 13th century. Arundel 377, 13th century, fol. 104. Sloane 2424, 14th century. Additional 18210, 13-14th century. Egerton 830, 15th century, Dialogus de philosophia inter Henricum II (_sic_) Normannorum ducem et ipsum auctorem.... BN 6415, 14th century; and 4694. Montpellier, École de Méd. 145. Troyes 1342. CHAPTER XXXVIII SOME TWELFTH CENTURY TRANSLATORS, CHIEFLY OF ASTROLOGY FROM THE ARABIC IN SPAIN Importance of medieval translations--Plan of this chapter--Transmission of Arabic astrology--Walcher, prior of Malvern--Pedro Alfonso--His letter to the Peripatetics--Experimental method--Magic and scepticism in the _Disciplina clericalis_--John of Seville--Dates in his career--Further works by him, chiefly astrological--John’s experimental astrology--Gundissalinus _De divisione philosophiae_--Place of magic in the classification of the sciences--Al-Farabi _De ortu scientiarum_--Gundissalinus on astrology--Robert Kilwardby _De ortu sive divisione scientiarum_--Plato of Tivoli--Robert of Chester--Hermann the Dalmatian--Hugh of Santalla--A contemporary memorial of Gerard of Cremona--Account by a pupil of his astrological teaching--Character of Gerard’s translations--Science and religion in the preface to a translation of the _Almagest_ from the Greek--Arabs and moderns--Astronomy at Marseilles--Appendix I. Some medieval Johns, mentioned in the manuscripts, in the fields of natural and occult science, mathematics and medicine. [Sidenote: Importance of medieval translations.]