Pro-Active Mail-Art

Well, here is a new thing in Mail-Art. I have spotted the digital image of a letter that still has to arrive here in Breda. It is sent to me by Nico van Hoorn. A reaction is already sent today so my answer even gets to Nijmegen before Nico's mail arrives here. Pro-Active Mail-Art: Send you mail-art answer even before your mail-art from someone else has arrived....