The article is devoted to a survey of one of the elements of textual organization in the Erdeni Tunumal, the Mongolian literary monument of the 17th century. The text does not have a clear, graphically structured division into chapters or parts. Its segmentation is performed with the use of the special formula «thus it was», which marks certain episodes or the most important events (as seen by the author). Such a segmentation of the text, inherent in many Mongolian chronicles of the 17th century, is subjective and cognitive in nature and represents the source of the pragmatic approach to the text division in future.