Francis Cadell was an Australian explorer and navigator born in 1815. He is best known for his significant contributions to the exploration of the Murray River, which is one of Australia's longest rivers. Cadell played a crucial role in opening up the river for navigation, which facilitated trade and transport in the region. In addition to his work on the Murray River, Cadell also explored other waterways in Australia, including the Darling River. His efforts helped to improve the understanding of Australia's inland geography and contributed to the development of the country's transport systems during the 19th century.