 Lewental was the proprietor also of the "Świt", edited for a few years by Maria Konopnicka.In 1871, also, he issued an edition of the works of Korzeniowski (better-known in the English-speaking world as Joseph Conrad), which proved so popular that it led later to similar editions of the works of Kraszewski, Kremer, Rzewuski, Skarbek, Fredro, Syrokomla, Eliza Orzeszkowa, Kaczkowski, Bałucki, etc.In 1874 Lewental commenced the publication of the best productions of European literature under the title "Biblioteka Najcelniejszych Utworow Literatury Europejskiej."