That may well have been--Eusebius is often celebrated, by both the two main Catholic sects (Byzantine and Roman) and by the various Orthodox sects, as the father of church history. If Vidal simply has Julian reading him, and doesn't attempt to equate them in time as both being living adults, then he does not violence to history.
Wha hopened? (Hop, of course, referring to that little hare of the dog that bit you in Australia). Everyone with any sense is on this thread. You dissapoint me. It's boring.