Ewald's periodical I cannot refer to, but Hilgenfeld, after an elaborate review of the question, decides that the chapters were omitted [Endnote 141:5].

This is the only authority I can find for the 'certainty that Jerome found them' in his version.
On the whole, then, it seems decidedly more probable (certainties we cannot deal in) that the incident referred to by Hegesippus was missing from the Gospel according to the Hebrews.

That Gospel therefore was not quoted by him, but, on the contrary, there is a presumption that he is quoting from the Canonical Gospel.

The narrative of the parallel Gospel of St.Luke seems, if not to exclude the Massacre of the Innocents, yet to imply an ignorance of it.
The next passage that appears to be quotation occurs in the account of the death of James the Just; 'Why do ye ask me concerning Jesus the Son of Man?
He too sits in heaven on the right hand of the great Power and will come on the clouds of heaven' ([Greek: Ti me eperotate peri Iaesou tou huiou tou anthropou?
kai autos kathaetai en to ourano ek dexion taes megalaes dunameos, kai mellei erchesthai epi ton nephelon tou ouranou]).

It seems natural to suppose that this is an allusion to Matt.xxvi.64, [Greek: ap' arti opsesthe ton huion tou anthropou kathaemenon ek dexion taes dunameos, kai erchomenon epi ton vephelon tou ouranou].