In 1953, he went to Urapunga Station to repair a marine engine and met Dr WA (Spike) Langsford of the Department of Health accompanying him on a survey of the
Victoria River District. He then worked as a medical assistant for the department and became well known for seeking out Aboriginal people in remote areas with
leprosy, encouraging them to come to Darwin for treatment. It earned him the title of 'Leper Hunter'.
Queen Elizabeth II visited Roberts on her 1963 visit to Darwin. In 1969 he was selected as one of only three advisers for the Council of Aboriginal Affairs established after the
1967 Referendum. He advised the Commonwealth Government of Australia on Aboriginal policies and programs. It won the major literary award at the
Adelaide Festival of the Arts in 1962. It was developed into an hour-long film in 1964. ==References==