Who doesn&rsquot like postcards, even in this day and age of virtual reality It would seem that postcards have been quite a rage for over 100 years now, as these ones from Pompei suggest. These cards of unknown provenance are usually in the keeping of enthusiasts in Europe and America. Although we don&rsquot know much about them, these haunting images of the site of probably the world&rsquos best known natural disaster reveal more about its tragedy than any modern colour photograph can ever reveal.