Vainly the composer scanned the various CLEFS, vainly he strove to endow with significance the sparse bunches of notes scattered over the white ruled paper.
"Melomaniacs"
James Huneker
Gyp bowed and pulled a roll of parchment out of Brother Dubsix's pocket, which was written all over with musical notes in the bass and treble CLEFS.
"Yellow-Cap and Other Fairy-Stories For Children"
Julian Hawthorne
The use of the C-CLEFS is left optional with the teacher.
"A Treatise on Simple Counterpoint in Forty Lessons"
Friedrich J. Lehmann