You notice a small slip of parchment with charred edges. Further inspection reveals a simple yet concise message in loopy, feminine script:

"Be discreet in word and deed,
Else the wrathful flames you feed.
Plot your plans with utmost care,
The heat might be too much to bare."

There is no evidence of a formal signature, save for a tiny stylized "P" illuminated with gold leaf at the bottom of the note.