Footnote 33 in Chapter 8 of Ernst Robert Curtius’s European Literature and the Latin Middle Ages, commenting on lines from Smaragdus of Saint-Mihiel’s didactic poem on grammar, “Partibus inferior jacet interiectio cunctis / Ultima namque sedet et sine laude manet”:
“Sad is the lot of the interjection, for of all the parts of speech it has the lowest place. There is none to praise it.” On the way from Latin to French, the penultimate syllable of the proparoxytone succumbed. Mallarmé was so touched by this that he wrote a prose poem on the “Death of the Penultimate” (Le Démon de l’analogie in Divagations). It ends: Je m’enfuis, bizarre, personne condamnée à porter probablement le deuil de l’explicable Penultième. Grammar too has its tragedies.