And the clock struck thirteen: The life and thoughts of Kaurna Elder Uncle Lewis Yerloburka O'Brien as told to Mary-Anne Gale (2007) is the memoir of Lewis William Arthur O’Brien, usually known as Uncle Lewis O’Brien.

Uncle Lewis O’Brien is an Aboriginal Australian elder of the Kaurna people.

He was born at Point Pearce Mission on Yorke Peninsula, South Australia on 25 March 1930. He was raised in the care of his great uncle & aunt, Lewis & May Adams until he was made a ward of the South Australian state when he was 12 years old. He subsequently lived in a number of foster care placements and boys’ homes.

During the 1960s, O’Brien became involved in several movements advocating for Aboriginal Australians. From 1977 he also began working in schools promoting Kaurna language & culture. In 2002, he cofounded Kaurna Warra Pintyanthi, a group developing & promoting Kaurna language.

In 2025, O’Brien, in consultation with staff, chose the official Kaurna name for the new Adelaide University. Tirkangkaku means “place of learning”.