A description of the parish village of Tłokinia near Kalisz in a register of endowments of Gniezno archdiocese (1521) includes a reference to the settlement called “Szremino” belonging to the parish priest, which was confirmed by a document issued by Duke Przemysł II. Such a document is not known today, but it is mentioned in a constistory register from the fifteenth century on the occasion of lawsuits between parish priests and their noble neighbors. Undoubtedly, the lost document of Przemysł concerned the grant of the village to the parish church at Tłokinia. The issue of the charter could be associated with the duke’s visit to Tłokinia, evidenced in a preserved document of 1 A ugust 1284. Historical material I have collected makes it possible to reconstruct the fate of a lost settlement, probably called Szaromin (Żaromin?). The article is an example of how it is possible to obtain reliable information about lost medieval charters from the early modern registers.