Question: What is the name of this Victorian era theatrical partnership of a librettist and composer for which James Conroy-Ward is best known for performing its principal comic roles?
Sentence (from "James Conroy-Ward"): James Conroy-Ward (born 12 April 1947) is a music publisher and retired English actor and singer best known for performing the Gilbert and Sullivan principal comic roles with the D'Oyly Carte Opera Company.
Relevant evidence: Yes