The object of the research is the epistolary discourse by M. Kulish; the purpose is to find out the typological and pragmatic characteristics by the discourse markers and reveal their role in organizing and authorizing the epistolary discourse by M. Kulish; the methods used in the research are as follows: an inductive method (for linguistic generalizations, conclusions on the communicative-pragmatic aspects of M. Kulish's epistolary discourse on the basis of the analysis of discourse markers in his epistolary works); general scientific methods of analysis and synthesis, that is, the division of the whole into parts and the description of each of the parts, and then - the combination of these parts in a holistic system (the methods are used to distinguish the corpus of discourse markers in M. Kulish’s epistolary works, to differentiate their meaning, and then to combine them into a holistic classification); inductive-deductive method (in order to by means of analysis of known interpretations of linguistic concepts, discourse, epistolary discourse, linguistic personality, discourse, structural frame of a letter, etc. to specify their definitions, their understanding from the communicative-pragmatic point of view, as well as to formulate their own classification of these markers of the epistolary discourse on the basis of existing classifications); modeling, which, after clarifying the macrostructure of the model of epistolary communication, was correlated with M. Kulish's epistolary works; descriptive method with the use of context observation techniques for describing the research material – discourse markers in M. Kulish's epistolary works; the method of pragmatic analysis (for the study of discourse markers in the communicative-pragmatic aspect in order to identify the most important implicators and illocations that predetermine these discourses and prepositions that precede them); the novelty of the research: for the first time the corpus of discourse markers has been selected and their typology based on the communicative and pragmatic aspects of their usage and the frame structure of the epistle has been introduced in the epistolary discourse. The concept of the matrix of the epistle has been introduced into the theory of epistolary discourse. The necessity of allocating the inner and outer frames of the letter has been suggested and proved. An integrated classification of discourse markers has been created based on the matrix structure of the epistle, which takes into account both functional and communicative-pragmatic characteristics of these variant units of discourse. The role of discourse markers in organizing and authorizing the epistolary discourse by Mykola Kulish has been defined; the three-dimensional scope of the discourse markers functioning (time, locus, communicative space) has been suggested and specified, where time is the temporal part of the discourse modus, the locus depicts the topos features of the discourse, the communicative space concentrates presuppositions, depicts the localization in the discourse, presupposes the use of a certain functional style; the results of the research can be used when teaching such courses as: "Stylistics", "Text Linguistics", "Discourse Studies", "Fundamentals of Pragmalinguistics", as well as the possibility of using the developed research apparatus for the analysis of discourse markers in the epistolary works by prominent linguistic individuals with the aim of identifying their epistolary idiostyle; field – linguistics.