Praecipue dum Frons tenera imprudensque laborum.
"The Roman Poets of the Augustan Age: Virgil"
W. Y. Sellar
Again the first part of the stanza might be indivisible, when it was called the Frons, the divided parts of the second half being the versus; in this case the Frons had its own musical theme, as did the first versus, the theme of the first versus being repeated for the second.
"The Troubadours"
H.J. Chaytor
609: illi caperrat Frons severitudine; Mer.
"The Dramatic Values in Plautus"
Wilton Wallace Blancke