Biography.com: Stephen, Leslie - Concise paragraph on this British scholar's life.
History of Ideas: Leslie Stephen - Detailed biographical study by John Bicknell, from the Thoemmes Dictionary of Nineteenth-Century British Philosophers.
Internet Encyclopedia of Philosophy: Leslie Stephen - Concise article on his life and teachings.
Victorian Age Philosophers: Leslie Stephen - Brief section from a larger work, emphasizing his ethical interpretation of evolutionary theory.
Wikipedia: Leslie Stephen - Entry from this open-access reference work.