As a lagoon re-emerges and country heals, an Aboriginal past is revealed In 2010 I spoke with 88-year-old Les Warnes at his home in Burra, South Australia. Les is one of many mid-northerners I interviewed between 2010 and 2013 as part of a project to learn if, among settler descendants who have grown up on land occupied by their forebears in the nineteenth century, stories of Aboriginal people's historical presence in the district had passed…