The cloning books were extensively, and had quite a few notes written in the margins, discussing the benefits and drawbacks of each method described, there's multiple handwriting types - small, tight print, elegant lightly-pressed cursive and crisp, dark right-slanting print, suggesting the books had been passed along in a way that mean the conspirators weren't meeting each other face to face.

The poisons were marked by worlds, and it seems Dark Arcanum actually came from Councilor Thomas' world, a strange coincidence or someone's sick joke.