The Codex Fuldensis includes a prologue to the Catholic Epistles referring to the comma (beginning with the words 'Non ita ordo est apud Graecos'). It presents itself as a letter of Jerome to Eustochium, but is the work of an unknown imitator, likely from the late 5th century. Its inauthenticity is stressed by the omission of the passage from the manuscript's own text of 1 John, but it demonstrates that some theologians of the fifth century felt it should be included.