In 1848 Benjacob returned to Vilnius, and for the next five years he and the poet Abraham Dob Bär Lebensohn were engaged in the publication of the Bible with a German language translation (in Hebrew type) and the new "Biurim" (Vilnius, 1848–1853, 17 vols.), which did much good as a means of spreading the knowledge of German and a proper understanding of the Hebrew text among the Jews in Russia. When this work was done he brought out his corrected and amended edition of Chaim Joseph David Azulai's "Shem ha-Gedolim" (Vilnius, 1853; Vienna, 1862), which is still the standard edition of that important work. In 1862 Benjacob announced his intention to begin the publication of popular editions of classical Hebrew works which had become rare or high-priced. He died soon after the appearance of the first volume of Azariah dei Rossi's "Meor 'Enayim," with which he started the series (Vilnius, 1863).