Conversation so far:
what is D'Oyly Carte?
is a professional light opera company that staged Gilbert and Sullivan's Savoy operas
what did Alfred Cellier direct while in D'Oyly Carte?
The Sorcerer
what was the most popular one Alfred Cellier directed in D'Oyly Carte?
George Grossmith's Cups and Saucers
what is something interesting about Alfred Cellier's D'Oyly Carte years?
Alfred Cellier was noted for his attempts to calm the audience during the fracas

Question: what did he do as conductor?
Self-contained rewrite: what did Alfred Cellier do as conductor?