Another postcard sent by Heleen (the Netherlands) for the Houses in the Mail project. I have posted postcards featuring houses in Amsterdam (here, here...). But any of them showed the detail you can see on the left, in the middle of the window frame: the spionnetje ('little spy'). It is a mirror outside the window, used since ages ago to see who is ringing the doorbell. Nowadays people use electronic devices... which are far less romantic!