p.s., I'll confess that it probably took me longer than most to catch on to "terces." Before I read the story, I had guessed that it was a term from some Romance language having to do with "three." (I could easily see the Latin word "tres" changing into "terces" over the millennia.) I had guessed it would come into play with the "love triangle for two" that is pre-revelation L&C. That hypothesis was so firmly rooted in my mind that it took me a while to dethrone it in favour of the more accurate interpretation. Of course, it was a head-palm moment when I did.)