Gibbon references "Panegyric Vet." or "Panegyric Veter." a few times in DandF's notes, e.g.
the orator Eumenius (Panegyric Veter. viii 6, or
Panegyr. Vet. v 18.
The Panegyric is referring to the Panegyrici Latini, but I can't figure out what the Vet. is. In doing some searching, I've found references in other books that are similar, e.g.
Panegyrici Veter. Gallicani or
Panegyrici Latini Vet. 2 (12).5.1-2. But in no case have I seen it spelled out, and I haven't found any reference in any general entries on the Panegyrici Latini to it or anything like it.
What does the Vet./Veter. stand for?