7. A is for Anthrax

Katharine tells Lorien about the  worst thing you can get in the mail.  Sources: https://www.cdc.gov/anthrax/basics/index.html https://en.wikipedia.org/wiki/2001_anthrax_attacks https://www.fbi.gov/history/famous-cases/amerithrax-or-anthrax-investigation https://www.propublica.org/article/new-evidence-disputes-case-against-bruce-e-ivins https://www.cdc.gov/anthrax/bioterrorism/threat.html