During an inventory carried out in the Kórnik Library in October 2016, the author of this article found an unknown parchment document drawn up in 1415, which was purchased to be included in the library collections in 1954, but was not described or provided with a call number at the time and nobody knew about its existence for almost 60 years. In the document, brothers Stanisław and Jakusza, heads and owners of the Lgota village, confirm their sale of a part of their estate, i.e. a certain part of their land at Lgota, which could be flooded by the local pond-stream, to Mikołaj – the Provincial Superior, and the convent of the Pauline Fathers in Jasna Góra. At the same time, both brothers release the Pauline monks from any claims from their mother Katarzyna, and their sisters Jachna, Helena, and Dobrochna. The sale of the land meant for a flooded area should be related to the fact that in 1414 King Ladislaus Jagiello granted the village of Kalej neighbouring with the village of Lgota to the Pauline monks and possibly with their intention to erect a water mill. The document provides us with some new information for genealogical research on Polish nobility in the Middle Ages, and mentions the previously unknown name of the Provincial Superior of the Polish Province of Pauline Fathers – Mikołaj, who served this function in 1415.
The discovery of a seventeenth-century duplicate copy of two letters (one written by Cardinal Zbigniew Oleśnicki to John of Capistrano on 15.04.1452, and the latter’s reply to the Cardinal and King Casimir Jagiellonian) on sheet 191 of the manuscript marked Chigi Q II 51 kept in the Vatican Apostolic Library, made it possible to determine the previously unknown provenance of the manuscript marked 1399 I from the Princes Czartoryski Library. As a result of an analysis of the content and the layout of the duplicate copy, it was established that the text from sheet 191 was copied directly from the manuscript kept in the Princes Czartoryski Library. The Chigi manuscript contains information on the source of the duplicate: a manuscript kept in St. Anne’s Franciscan friars monastery in Warsaw. Therefore, the monastery should be recognised as the place in which the Princes Czartoryski Library manuscript marked 1399 I was kept in the 17th century. It ended up there in the second half of the 15th century, soon after the monastery was founded, and was most probably kept there as long as until the beginning of the 19th century, when it was purchased by Tadeusz Czacki.