His Edward the Black Prince, 1887 t.p. (Douglas B.W. Sladen)
His The Douglas romance, 1916 t.p. (Douglas Sladen)
Francesca Halstead, 187-? t.p. (Reginald St. Barbe)
Dict.lit.pseud.Engl.lang., 1995 p. 144 (St Barbe, Reginald pseud. of Douglas Brooke Wheelton Sladen)
Wikipedia, March 18, 2014 (Douglas Brooke Wheelton Sladen, born 5 February 1856 in London, died 12 February 1947 in Hove; English author; studied at Trinity College, Oxford; first professor of history in the University of Sydney, Australia; subsequently settled in London as a writer)