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

Question: what is something interesting about his D'Oyly Carte years?
Self-contained rewrite: what is something interesting about Alfred Cellier's D'Oyly Carte years?