Caste is a comedy drama by T. W. Robertson, first seen in 1867. The play was the third of several successes by Robertson produced in London's West End by Squire Bancroft and his wife Marie Wilton. As its name suggests, Caste concerns distinctions of class and rank. The son of a French nobleman marries a ballet dancer and then goes to war. When word arrives that he has been killed in action, his mother tries to wrest the child from his penniless widow. Source: Wikipedia (en)