Thanks, Audrey. D'you know why ours haven't got all the bells and whistles? And I'd appreciate a few pointers on tracing an unregistered CAT. I'm very, very good at this sort of thing, trust me. We've got messages to work with. But whoever's been sending these messages isn't the murderer, they're a friend. They don't trust the Sheriff to sort things out, though, that's clear enough.