They opened a new print shop in Zabłudów (Zabludiv or Zabludaŭ, Grand Duchy of Lithuania, now in Poland) on the premises of the estate of hetman Jeremi Chodkiewicz.
In the summer of 1569 Mstislavets left for Vilnius and soon opened a print shop, equipped and financed by merchants Mamonichs.
Here he printed The Four Gospels (Четвероевангеліе) in 1574–1575, which contained four full-page engravings with Evangelist portraits.
In January 1576 Mstislavets finished printing the Psalter (Псалтырь) with a woodcut frontispiece, (Tsar David, or Царь Давид), multiple illuminations and decorated capital letters.
The court mandated him to return all of his printed books to the merchants and allowed him to keep his typographical equipment.