Słowa kluczowe: natural horn, valve horn, French horn, cor d'orchestre, cor solo, adaptation of valve horns, Adam Epler, Lviv, guitar, mandolin orchestra, Polish Radio, Katyn massacre victim, sinfonietta, chamber music, Polish music, performance, re-performance, performer, Fluxus, George Brecht, feminism, cricital theories, gender, ethnomusicology, bones, concertina, sailors' instruments, Ten-a-penny Band