This doctrine of ἑρμηνεία occurs all through the book. The author is trying to make out that well-known passages of both the Old and New Testaments were in fact prophetic utterances showing forth in advance the marvels he narrates. While the Psalms of David quoted by him are Canonical, the Odes of Solomon are the Apocrypha known under that name and quoted by Lactantius (_Div. Inst._ Bk IV. c. 12). For some time the _Pistis Sophia_ was the only authority for their contents, but in 1909 Dr Rendel Harris found nearly the whole collection in a Syriac MS. of the 16th century. A translation has since been published in _Cambridge Texts and Studies_, vol. VIII. No. 3, Cambridge, 1912, by the Bishop of Ossory, who shows, as it seems conclusively, that they were the hymns sung by the newly-baptized in the Primitive Church. Footnote 541: Astrological doctrine first becomes prominent in Gnostic teaching in the _Excerpta Theodoti_ which we owe to Clement of Alexandria. We may therefore put their date about the year 200. This would be after the time of Valentinus himself, but agrees well with what M. Cumont (_Astrology and Religion_, pp. 96 _sqq._) says as to the great vogue which astrology attained in Rome under the Severi. Its intrusion into the Valentinian doctrines is much more marked in the Μέρος τευχῶν Σωτῆρος than in the _Pistis Sophia_, and more in the Bruce Papyrus than in either. Footnote 542: See Chap. VIII, pp. 73, 74 _supra_. Footnote 543: Origen, _cont. Cels._ Bk VI. c. 34. Footnote 544: