His evidence therefore may fairly be said to cover the period from 165-175 A.D.
The author of 'Supernatural Religion' seems to be somewhat beside the mark when he says that 'in regard to Ptolemaeus all that is affirmed is that in the Epistle to Flora ascribed to him expressions found in John i.

3 are used.' True it is that such expressions are found, and before we accept the theory in 'Supernatural Religion' that the parenthesis in which they occur is due to Epiphanius who quotes the letter in full himself [Endnote 302:1], it is only right that some other instance should be given of such parenthetic interruption.

The form in which the letter is quoted, not in fragments interspersed with comments but complete and at full length, with a formal heading and close, really excludes such a hypothesis.

But, a century and a half before Epiphanius, Irenaeus had given a string of Valentinian comments on the Prologue, ending with the words, 'Et Ptolemaeus quidem ita' [Endnote 302:2].

Heracleon, too, is coupled with Ptolemaeus by Irenaeus [Endnote 302:3], and according to the view of the author of 'Supernatural Religion,' had a school around him at the time of Irenaeus' visit to Rome in 178 A.D.But this Heracleon was the author of a Commentary on St.John's Gospel to which Origen in his own parallel work frequently alludes.