English archaeologist and anthropologist. In 1948 she discovered, on Rusinga Island, Lake Victoria, East Africa, the prehistoric ape skull known as Proconsul, about 20 million years old; and human footprints at Laetoli, to the south, about 3.75 million years old.
The Union Jack marks Australia's historical links with Britain. The Southern Cross helped guide early European navigators to the continent. Effective date: 15 April 1954.