[OldDeckHand]

"Anybody have a map of where Portus was/is actually located in Italy?"

I'm pretty sure that ancient Portus is now what is known as Fiumicino, which is the coastal town adjacent (west and a bit south) of modern Rome that lays at the mouth of the Tiber River. It's where da Vinci airport is, if you're familiar with Rome.

[Jim W N]

Thanks. Interesting.