C. Ital: Blaise et Babet1 et Isabelle et Gertrude.2
1. This was the third time JQA had seen this musical comedy in less than three weeks.
2. Isabelle et Gertrude, ou, les sylphes supposés, Paris, 1765, by Charles Simon Favart, with music by Adolphe Blaise (Brenner, Bibliographical List description begins Clarence Dietz Brenner, A Bibliographical List of plays in the French Language, 1700-1789, Berkeley, 1947. description ends ).