What do we reckon is the most logical explanation?
Just picked up today's post and amongst the routine stuff was a fairly small handwritten envelope. It was stamped and addressed to our house - no name on it.
You could see it had a CD in it and when I opened it up that was it. No note - just one of those CDs you can record things onto.
The handwriting looked like that of a couple of people I know so I'll check with them, although I can't think why they'd send a CD and also not address it to me. Presumably not a great idea to put inside a DVD player/computer, if we even have one that can read this type of CD?