1. MS Mus. 1793/1/4 Reference (shelfmark): MS Mus. 1793/1/4 Title: Leonid Feĭgin: Sister Beatrix. Ink full score Scope & Content: "Sestra Beatrisa", opera, op. 21; 1963. Based on a play by Maurice Maeterlink. In 2 acts. Score in ink. Russian words. Collection Area: Music Collections Languages: English Date Range: 1963 Extent: 110 folios