Darrell Lewis is an archaeologist, historian and bushman who has worked in the Outback for more than forty years. He has driven, helicoptered, boated or walked into many remote regions to document historic sites, record natural features and photograph Aboriginal rock art. He has also worked extensively with Aboriginal peoples and other residents in the Northern Territory and elsewhere. His books and articles cover Aboriginal rock art, environmental history, cattle station technology, European exploration and settlement of the Northern Territory. His most recent title is Where is Dr Leichhardt?: The Greatest Mystery in Australian History.