Letter of Jeremiah
The epistle is one of three deuterocanonical books found among the Dead Sea scrolls (the other two are Ben Sira and Tobit.)  The portion of the epistle discovered at Qumran was written in Greek. This does not preclude the possibility of the text being based on a prior Hebrew or Aramaic text. However, the only text available to us has dozens of linguistic features available in Greek, but not in Hebrew, hence introductions of a Greek editor, not required for minimalist translation.