Sladen studied at Cheltenham College and at Trinity College, Oxford, B.A. with first-class honours in modern history. In 1879 he emigrated to Melbourne, where he graduated B.A. and LL.B. at the local university. In 1882 he was appointed to the chair of history in the university of Sydney. This he resigned in 1884, and returned to England.
Some or all works by this author are in the public domain in the United States because they were published before January 1, 1923.
The author died in 1947, so works by this author are also in the public domain in countries and areas where the copyright term is the author's life plus 60 years or less. Works by this author may also be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.