Drummond, vol. i, p. 13. Footnote 164: _Stromata_, bk. v, ch. 9. Nor was such mysticism advocated by theological writers alone. Roger Bacon—but one instance from many—declared that one lessened the majesty of knowledge who divulged its mysteries, and even went to the length of enumerating seven methods by which the arcana of philosophy and science might be concealed from the crowd (_a vulgo_), _De Secretis Artis et Naturae et de Nullitate Magiae_. Rolls Series, vol. xv, pp. 543–544. Footnote 165: _De Civitate Dei_, bk. xi, ch. 30. Footnote 166: “Aliquando _De Motu Terrarum_ volumen iuvenis ediderim.” L. Annaei Senecae _Naturalium Quaestionum Libri Septem_, bk. vi, ch. 4. The edition by G. D. Koeler, Gottingen, 1819 has convenient summaries indicating contents at the head of each book, and devotes several hundred pages to a “Disquisitio” and “Animadversiones” upon Seneca’s work. In Pancoucke’s _Library_, vol. cxxxxvii, a French translation accompanies the text. Footnote 167: “Veniet tempus, quo posteri nostri tam aperta nos nescisse mirentur. Harum quinque stellarum ... modo coepimus scire.” Bk. vii, ch. 25. Footnote 168: Bk. vii, ch. 31. “Non semel quaedam sacra traduntur. Eleusin servat quod ostendit revisentibus. Rerum natura sacra sua non simul tradit. Initiatos nos credimus; in vestibule eius haeremus. Illa arcana non promiscue nec omnibus patent; reducta et in interiore sacrario clausa sunt.” Footnote 169: Bk. iv, ch. 7. “Et apud nos in duodecim tabulis cavetur ne quis alienos fructus excantassit. Rudis adhuc antiquitas credebat et attrahi imbres cantibus, et repelli; quorum nihil posse fieri, tam palam est, ut huius rei causa nullius philosophi schola intranda sit.” Footnote 170: Bk. v, ch. 6 for animals being generated in flames. Bk. ii, ch. 31 for snakes struck by lightning. Bk. iii, ch. 25 for the Nile. Bk. iii _passim_, for marvelous fountains, _etc._ Footnote 171: Bk. iii, ch. 25. Footnote 172: Bk. iii, ch. 26. Footnote 173: Bk. ii, ch. 32. “Quidquid fit, alicuius rei futurae signum est.” Footnote 174: Bk. ii, ch. 46. Footnote 175: Bk. i, ch. 1. Footnote 176: Bk. vii, ch. 30. “Egregie Aristoteles ait, numquam nos verecundiores esse debere, quam quum de diis agitur. Si intramus templa compositi, si ad sacrificium accesuri vultum submittimus, togam adducimus, si in omne argumentum modestiae fingimur; quanto hoc magis facere debemus, quum de sideribus, de stellis, de deorum natura disputamus, ne quid temere, ne quid impudenter, aut ignorantes affirmemus, aut scientes mentiamur?” Footnote 177: Bk. ii, ch. 10. Footnote 178: Bk. vii, ch. 28. “Chaldean” was often used to denote an astrologer without reference to the person’s nationality. Footnote 179: