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, critical theories, gender, ethnomusicology, bones, concertina, sailors’ instruments, Ten-a-penny Band