I just want to add my two cents, though it probably exists already in this thread.
The use of letter notation for the second set of numbers makes me think this denotes two statements or sentences.
"The sun always sets. To hide a l(ight)..." is what I would guess this message will expand to later.
So the question is, how would one hide a light? Cover it, with a clinging, viscous substance? Or perhaps create a corner to hide in, an acentric pavillion of shadow and secrecy.
Thene there's heresy written in mirror-script, just far too many possible allusions here.
Le Blanc's motif is the mirror, is her ancient role under threat?
Or is this referring Leona, who's enemy must be a heretic in IronStylus' eyes?
What about the original lady of luminosity, has she no say here?
Even with my guess'd narrowing of the clues... there so, so much it could be a reference too.
Even if duskblade Leona seems the most likely...
Edit: forgot to mention, I started to think it's a hint about stealth rework... as I started thinking above^ around 'acentric pavilion'.