Piano Concerto
... that the first version of the Piano Concerto by Frederick Delius was never performed in public, but the composer played a two-piano reduction with Ferruccio Busoni in 1898?
... that the first version of the <b id="mwAwI"><a href="./Piano_Concerto_(Delius)" id="mwAwM" rel="mw:WikiLink" title="Piano Concerto (Delius)">Piano Concerto</a></b> by <a href="./Frederick_Delius" id="mwAwQ" rel="mw:WikiLink" title="Frederick Delius">Frederick Delius</a> was never performed in public, but the composer played a two-piano reduction with <a href="./Ferruccio_Busoni" id="mwAwU" rel="mw:WikiLink" title="Ferruccio Busoni">Ferruccio Busoni</a> in 1898?