Cello Sonata
... that the Cello Sonata by John Foulds features quarter tones in the second movement, but it is uncertain if he introduced them in the 1905 version or the 1927 revision?
... that the <b id="mwA-Q"><a href="./Cello_Sonata_(Foulds)" id="mwA-U" rel="mw:WikiLink" title="Cello Sonata (Foulds)">Cello Sonata</a></b> by <a href="./John_Foulds" id="mwA-Y" rel="mw:WikiLink" title="John Foulds">John Foulds</a> features <a href="./Quarter_tone" id="mwA-c" rel="mw:WikiLink" title="Quarter tone">quarter tones</a> in the second movement, but it is uncertain if he introduced them in the 1905 version or the 1927 revision?