The Commentary on Jeremiah is in six books; but Jerome did not live to finish it. It was written between the years 317 and 319, but only extends to chapter xxxii. It was dedicated to Eusebius of Cremona. The Prefaces, which are full of vigour, contain many allusions to the events and controversies of the last years of Jerome’s life. In the Preface to Book i., after speaking of the Book of Daniel and the apocryphal Letter of Jeremiah as not belonging to the prophet’s writings, he continues: