I was just about to turn in for the night when my doorbell rang. I used to be a spy during the Cold War so the first thing I did was grab a gun, a Walther PPK, from one of the drawers in my bedroom. I had a weapon in almost every room in my house, a habit that I had picked up long ago.
'Who is it?' I called out from the side of the door.
'It's Harry. Open up old friend,' a voice called to me.