CENTURYThe article analyses a copy book (“а book-archive”) of the period of the 17th – beginning of the 18th centuries, written and owned by Mgarsky Monastery of the Transfiguration of the Savior, which is near the town of Lubny. The copy book is the valuable historical source. The original part of the book, which contains documents of Hetmans and colonels of the Hetmanate, is carefully considered. Some of them, of the 18th century, which was remained unpublished for a long time after the book discovery, now are published in the article (these are the universals of Hetmans Bohdan and Yuri Khmelnytsky, Pavel Teteria, as well as of Colonel of Lubny Maksym Illyashenko).