Anna Thillon was an operatic singing sensation in the United States, based in San Francisco, California

San Francisco, California

San Francisco , officially the City and County of San Francisco, is the financial, cultural, and transportation center of the San Francisco Bay Area, a region of 7.15 million people which includes San Jose and Oakland...

 and then New York, New York. She performed in that city's first professional season.
In London at the Princess's Theatre in 1848, Jan. 20 and subsequently, she appeared in The Young Guard (Edward Loder 1813-1865) as ....? with contralto Sara Flower

Sara Flower

Sara Elizabeth Flower was a British-born contralto singer now almost forgotten to history who became Australia's first operatic diva...

(1820-1865) as Donna Olympia.