1 “For he that shall end it once for certeyne, / Shall never have neede to begin againe.”—Norton’s “Ordinall of Alchimy,” Theatr. chem. Brit., ch. 4, p. 48.

2 Olympiodorus in Berthelot, Alchimistes grecs, II, iv, 43.

3 Cf. the entertaining “Dialogus Mercurii alchymistae et naturae,” in Theatr. chem., IV (1659), pp. 449ff.