Hugh Denison can best be described as Princes’ own media magnate. He established Sun Newspapers, at one time owned eight Sydney newspapers, and in 1938 was founder of Macquarie Broadcasters, a company that controlled fifteen radio stations around Australia. His family had large tobacco interests, which he expanded through an amalgamation which formed the British Australasian Tobacco Company. During his busy life Denison served as a member of the Adelaide City Council and of State Parliament, was Commissioner for Australia in the United States, funded Mawson’s expedition to Antarctica, and supported a range of charities.
In 1905 he paid five guineas for the thoroughbred Poseidon, which won the Melbourne Cup and the Caulfield Cup twice, with total winnings of more than £20,000.
He was knighted in 1923.