ENThe aim of this literary research is the collection of 23 letters send by Bolesław Jacuński, an artist and sculptor (1854-1899), to Jan Karłowicz, a well known linguist and ethnographer. The letters, which have not been published before, are kept in the Lithuanian State Historical Archives in Vilnius. Bolesław Jacuński, 18 years younger than Karłowicz, was nursed by his mother, Antonina Karłowicz nėe Molochowiec and, for this reason, his letters are very personal in character. The letters were written and sent from Saint Petersburg (where Jacunski studied from 1879 to 1880), Vilnius, Odessa, and from a village located in the Kherson Governorate (last letter). The theme of each letter is strictly related to a particular place where the artist was staying. For example, he considered Saint Petersburg a place where academic and artistic life was very vivid, connected Vilnius with his difficult everyday life of a craftsman, and referred to the political events in the city in his letters from Odessa. Jacunski spent his last years in Georgia, where he died in 1899.