The article represents the correspondence between Vladimir Ivanovich Gerier, the professor of Moscow university and his student Vassily Vassil’evich Rozanov accumulated for 30 years (1886−1916). V.I.Gerier who was not an ordinary personality is unjustly cosigned to oblivion nowadays though his contribution to the science is indubitable. Gerier was the author of brilliant monographs on the Roman history, medieval history and modern history. His books have not become obsolete and are read with the most vivid interest. Gerier was a prominent figure of the public and pedagogic fields (he was the founder of the Higher female courses). V.V.Rozanov is more famous in the history of literature and philosophy of the late 19th — early 20th century. He was a leader of the «new religious conscience»? the founder of a new genre in literature («The fallen leaves») which had a great impact on the Russian writers. Nowadays Rozanov books are widely republished and his heritage has been investigated by scholars. Actuality of the correspondence is obvious: the possibility of spiritual communion between persons of different ages and social standings is demonstrated on the example of relationship between the faithful disciple and the responsive mentor.