\version "2.16.1" \include "definitions.ily" \include "clementi-op42-mus-L03-handel.ily" %LESSON III. Air del'Opera Atalante de HANDEL \score { \new PianoStaff << \new Staff = "upper" \LessonIIIUpper \new Staff = "lower" \LessonIIILower >> \layout { } }