Out of curiosity, do you know how he had got your phone number ? I'm just curious, as I don't think either my mobile or my landline could be deduced from the contents of my wallet (landline is in my landlord's name, not mine, so even directory enquiries wouldn't help).

It does have an 'in case of emergency, call...' number in it, so I guess someone could ring my parents up and get a message to me.

I once found a wallet, which was completely the reverse - absolutely everything had been removed from it, except £230 in cash. Surely the most incompetent thief ever. I took it to the police station, but it was never claimed so I got the cash ;)