The diaries of Maximilian Marx, which he called “Notes of an Old Man,” are unique material in its versatility and breadth. In his memoirs, Marx covers the historical and political layers of the second half of the 19th century, and also includes the results of ethnographic, geographical and scientific observations. “Notes of an Old Man” are of interest for the study of Polish-Russian relations. It is significant that, despite his Polish origin and the dramatic fate of an exile, Maximilian Marx was able to realize his personal, scientific and creative potential in the Russian Empire. The text of the memoirs was seriously edited and provided with scientific commentary that expands the understanding of the personalities and historical events mentioned by M. Marx. The book is intended for everyone interested in the history of the Russian Empire, researchers, teachers, students and graduate students. The publishing layout is saved in PDF A4 format.