/usr/share/xfig/Libraries/Music/modern/ is in xfig-libs 1:3.2.5.c-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/xfig/Libraries/Music/modern/base_clef.fig
/usr/share/xfig/Libraries/Music/modern/base_staff.fig
/usr/share/xfig/Libraries/Music/modern/eighth-tie.fig
/usr/share/xfig/Libraries/Music/modern/eighth.fig
/usr/share/xfig/Libraries/Music/modern/fermata.fig
/usr/share/xfig/Libraries/Music/modern/flat.fig
/usr/share/xfig/Libraries/Music/modern/half-dotted-down.fig
/usr/share/xfig/Libraries/Music/modern/half-dotted-up.fig
/usr/share/xfig/Libraries/Music/modern/half-down.fig
/usr/share/xfig/Libraries/Music/modern/half-up.fig
/usr/share/xfig/Libraries/Music/modern/natural.fig
/usr/share/xfig/Libraries/Music/modern/piano_keyboard.fig
/usr/share/xfig/Libraries/Music/modern/piano_keyboard_perspect.fig
/usr/share/xfig/Libraries/Music/modern/quarter-dotted-down.fig
/usr/share/xfig/Libraries/Music/modern/quarter-dotted-up.fig
/usr/share/xfig/Libraries/Music/modern/quarter-down.fig
/usr/share/xfig/Libraries/Music/modern/quarter-up.fig
/usr/share/xfig/Libraries/Music/modern/sharp.fig
/usr/share/xfig/Libraries/Music/modern/sixteenth-tie.fig
/usr/share/xfig/Libraries/Music/modern/sixteenth.fig
/usr/share/xfig/Libraries/Music/modern/staff.fig
/usr/share/xfig/Libraries/Music/modern/treble_clef.fig
/usr/share/xfig/Libraries/Music/modern/treble_staff.fig
/usr/share/xfig/Libraries/Music/modern/whole-dotted.fig
/usr/share/xfig/Libraries/Music/modern/whole.fig