Not so long ago, in the 1950s, people separated by distance had no other means to correspond with each except for mail. Correspondence was a major source of information for researchers of the 20th century history and history of the earlier period. A letter is not just an account of events. It reflects the authors' inner realm, personal feelings, experiences and hopes. People sent letters on business and letters to loved ones. Letters (1956-1982) Maryan Petsyukevich saw the light thank to the Bialystok Belarusian History Society. Although he lived far away in Torun, Maryan Petsyukevich was one of the most prominent researchers of Podlasie. He should be given credit for his studies of Belarusian ethnography in the area. His efforts resulted in the opening of Belarusian museums in Poland. The book features Petsyukevich's correspondence with Maryya Znamirouskaya-Pryuferava, Alyaksandar Berhman, Matsey Kanapatski, Lyutsyyan Turkouski, Yana Heydzinka-Pilatava and Yury Turonak. It also includes his correspondence with the Niva weekly, with which the researcher cooperated for quite a long time.