did you know that stamps used to have a language all their own? i did a little bit of research and was delighted to find a number of different diagrams depicting the various messages. you can read a very interesting summary of the history here. i wanted to take action though and test it out on some handmade flat cards! of course my receivers might just think i was drunk when applying my postage. so i've explained about the hidden message on the back of each postcard. some of the diagrams had conflicting messages but i decided to go with the following one (it was in english, and also had the most interesting lines).
my secret language postcards: