Bill frowned as she read the owl, wondering what could be the matter that Callum wanted to talk to him personally. Something that should come from him? It sounded...almost ominous. There was no point in worrying until he knew though, so he wrote back quickly.
Dear Callum,
You're welcome to drop in tonight if you wish. Is six okay? Let me know if some other time would suit you better, otherwise I'll see you tonight.