A small, very old metal brooch, likely steel, that shines faintly. It is stamped with a device of five interlocking circles — the same sigil that Professor [[Cyril Lancaster]] scrawled repeatedly across the encoded conspiracy wall in his hidden laboratory. - Found by [[Boo]] in Professor [[Aldric Venn]]'s private trophy case at Number 16 Camden Street during the [[Old Town Echoes]]' raid, and pocketed. It was displayed among his collection rather than worn — a kept prize rather than a personal effect. [[2026-07-25 - Edinburgh Session 12|Session 12]]