[ Do raised-eyebrows count as a vivid enough expression that it manifests itself in the tone of her voice? ] Quick travel mirrors. [ So, a Portkey. Apparition without needing to know the destination perfectly. She nods, mostly to herself. ]

And the Crossroads are what stabilises them? As in, does every Eluvian road lead to the Crossroads, or ...

[ Hold on, nerdy brain caught up with mouth. ] Oh, yes, I'd love to see them.