In this video slideshow, Guy Atkins introduces the Edwardian postcard, which, with its brevity and speed of reply, was the social media of its day.

Guy's article, The Edwardian Social Network, is the cover story of our June issue, which is out on May 23rd. Make sure you pick up a copy, or subscribe now to ensure you don't miss it.

Read more about postcard's at Guy's website, Postcardese.