The book of the famous Russian doctor, writer and archaeologist, member of the society of lovers of natural history, anthropology and ethnography (Moscow, 1892), Privy Councilor Vasily Markovich Florinsky (1834-1899) is part of the famous extensive work "Primitive Slavs on the monuments of their prehistoric life." The scientist asks the question: what peoples belong to thousands of ancient mounds scattered in the vastness of Siberia? On a huge archaeological material, Florinsky gives a clear and unambiguous answer: the oldest population of Siberia belonged to the tribes that later became known to history under the name of the Slavs.