From plague diary of Alexandre Yersin, who discovered the plague bacillus in July 1894. Photograph by Alexandre YersinThe third pandemic of plague (in its bubonic and pneumonic clinical forms) struck the globe between 1894 and 1959. As Yersinia pestis spread from country to country and from continent to continent, it left behind it not only a trail of death and devastation, but also a vast visual archive. It was the first time that plague would reach and establish itself in all inhabited continents. But it was also the first time that any epidemic would be photographed. As plague spread from harbour to harbour, and amongst cities, towns and villages, so did photographs of the pandemic through reproductions in the daily and illustrated press...