In his later years he taught vocals at Mariinsky Theatre ( known at the time as the Kirov Opera and Ballet Theatre ) and published memoirs on Tchaikovsky and Chalyapin , among many other musicians and composers he 'd met .
In 1935 Davydov returned to the USSR .
In Davydov 's later years Davydov taught vocals at Mariinsky Theatre ( known at the time as the Kirov Opera and Ballet Theatre ) and published memoirs on Tchaikovsky and Chalyapin , among many other musicians and composers he 'd met .
In 1935 Davydov returned to the USSR .