 Later he became a publisher and book-seller and went to Leipzig, where he published his first work, "Miktamim ve-Shirim" (Epigrams and Songs), which also contains an important essay on epigrammatic composition (Leipzig, 1842).Of the other works which he published there, his corrected edition of R. Bahya ibn Pakuda's "Chovot ha-Levavot", with an introduction, a short commentary, and a biography of the author, together with notes and fragments of Joseph Kimhi's translation by H. Jellinek, is the most valuable (Leipzig, 1846; Königsberg, 1859, without the introduction).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.