The eccentric Duchess of Queensbury fencing with her prot間?the creole; Soubise (otherwise "Mungo".) Rare caricature by William Austin; published May 1; 1773. Julius Soubise (1754 - 25 August 1798) was a freed Afro-Caribbean slave who became a well-known fop in 1760s/1770s Britain. He was one of the most prominent black persons in Britain at the time. Born on St. Kitts he was taken to England at the age of ten. In 1764; he was given to Catherine Douglas (n閑 Hyde); Duchess of Queensbury who gave Soubise a privileged life; treating him as if he were her own son. Soubise became the riding and fencing master to the Duchess.London; 1660-1825.From: Daniel Lysons; Collectanea: or; A collection of advertisements and paragraphs from the newspapers; relating to various subjects.C. 191. c. 15 volume 1; opposite page 350London; British Library.