In 1859, the neighbouring estates - Chrzęsne and Mokra Wieś - were bought by Koskowski brothers. Wincenty Koskowski took over Chrzęsne. His wife, Adolfa nee Zambrzycki was the great-granddaughter of Paschalis Jakubowicz, the owner of the famous manufactory of "kontusz sash” in Lipków, the Armenian ennobled by the King Stanisław August Poniatowski.
The Koskowskis had eight daughters, five of which survived to adulthood. The three oldest, Maria, Bronisława and Ewa were born yet in Brańszczyk, former seat of Koskowski family; Stanisław and Wincentyna came into the world already in Chrzęsne. The Koskowskis belonging to the wealthy, landowning nobility properly equipped their daughters. Maria and Stanisława inherited from the childless uncle the neighbouring village Mokra Wieś, Bronisław got Ulasek farm extracted from Chrzęsne. The youngest one, Wincentyna, inherited the palace and demesne in Chrzęsne. Between 1892 and 1898 Wincentyna married Zygmunt Karski, descended from a noble family with roots dating back to the fifteenth century. They had two children, Gabriela and Zygmunt.
Particularly interesting character was the son of Wincentyna and Zygmunt Karski - also Zygmunt. He was born in 1898 in Warsaw, but he spent his childhood and youth in his parents' house in Chrzęsne. As early as in the days of junior high school he showed interest in literary, and poetic abilities. Published in 1922, the first volume of his poems, however, was unfavourably received by the critics and for the next several years, Karski did not print anything, apart from the poems in French, published during his studies at the Sorbonne. He gave up writing and for some time served as the cultural attaché at the Polish Embassy in Bucharest. After returning to his country, he lived in Chrzęsne, where he also spent the war. After the war, together with his wife moved to Warsaw, where he worked as a translator, and also continued literary work, publishing poems in various literary journals. In 1964, he left for a long time to Paris. Shortly before his death, he returned to Warsaw, where he died in 1967. He was buried in the parish cemetery in Postoliska, and Jarosław Iwaszkiewicz participated in the funeral ceremony. The Palace in Chrzęsne did not belong at that time to the Karskis. Wincentyna with her daughter Gabriela lived on the estate until 1944.
After the war, forced by the communist authorities they left Chrzęsne to return there after their death. They are buried in the parish cemetery in Postoliska.