The most northerly roman fort investigated

[Nathan Ross]

Sorry, I'm not sure what you're driving at.

I thought you were referring to the idea (by Hoffman and the Gask Ridge Project, I think) that the road and towers were pre-Agricolan, and were perhaps built by Cerialis. This still falls within Flavian, of course... mile: I knew you were sceptical about this one though!

they are universally (almost universally: I am a sceptic) accepted as Flavian.

Ah, righto. That explains the note above - Antonine entirely, you think?