I set up a meeting, and thought I was being very clever by having it at the Hogsmeade watering-hole that wasn't a student hangout. The Hog's Head should have been called the Pigs" Sty, if you ask me, but I didn't think that we'd be overheard or interrupted. A lot of people turned out to be interested, and I put my plan into motion. We all agreed on a course of action, which was to have Harry teach us more advanced spells, and then I pulled out a sheet of parchment I had prepared ahead of time. Everybody who signed the parchment subjected themselves to a jinx that would make their faces break out in spots spelling "Sneak" if they ever betrayed us to the authorities.