- Winton Dean
(bc1741; d after 1779).?English mezzo-soprano and harpsichordist. She may have been the daughter of a Mrs Frederica who sang in the pasticcio opera L’incostanza delusa at the New Theatre in the Haymarket early in 1745. Cassandra was an infant prodigy as a harpsichordist; she played Handel keyboard concertos for her own benefit at the New Haymarket on ...