Staff and prisoners of Fremantle Prison occupied the former prison on The Terrace, Fremantle, in Western Australia, between 1855[1]: 7 and 1991.[2] Fremantle Prison was administered by a comptroller general, sheriff, or director, responsible for the entire convict or prison system, and a superintendent in charge of the prison itself. Prison officers, known as warders in the 19th century, guarded against escapes, enforced discipline, oversaw prisoner work, and instructed inmates in trades. Officers worked under stringent conditions until they achieved representation through the Western Australian Prison Officers Union. Convicts were initially of good character, as potential future colonists, but eventually less desirable convicts were sent, until the end of transportation in 1868. As a locally run prison, Fremantle's population was generally short-sentenced white prisoners in the 1890s, with very few Aboriginal prisoners; however, by the late 20th century, most prisoners were serving longer sentences, a higher proportion of them were violent, and Aboriginal people were over-represented.