Roma Mater.
As far as I can gather, the Mithraist, Parnesius, and his friend, Pertinax, are fictional characters created by Rudyard Kipling and the Andersons make them also co-religionists and friends of Gratillonius. Kipling makes Parnesius a centurion in the Thirtieth Legion but that was stationed elsewhere so the Andersons move him into the Twentieth, thus enabling him not only to be at the Wall as described by Kipling but also to meet Gratillonius there as described by them. This is one of many such details that I had not properly noticed or appreciated on three previous readings of The King Of Ys.
I expect the current rereading to be slow - leisurely - and to focus on this kind of detail of which there will be many.
Poul Anderson's works encompass both the Roman Empire and the Terran Empire - and also a lot more than empires!









