The article analyses the relationships between two scholars belonging to different generations: V.I. Lamansky, a Slavic Scholar, and A.S. Lappo-Danilevsky, a historian. It is emphasized that they supported two different ideological and philosophical movements: Slavophilism, on the one hand, and Westernizm, on the other. At the same time, a general philosophical approach to history was the fact which united both scholars. Lamansky’s philosophy of history continued Slavophile historiosophy and partly anticipated Eurasianist historical conception. Lappo-Danilevsky was rather focused on dealing with theoretical-methodological and epistemological issues of historical scholarship by taking into consideration philosophical ideas proposed by Positivism and Neo-Kantianism. Russian 18th century history became a common research topic of both scholars. The collaboration in the Academy of Sciences Commissions also contributed to the friendship between Lamansky and Lappo-Danilevsky. The author quotes the preserved correspondence of two scholars which allows to trace partly the details of their relationships.