All this authenticates the song, which thereupon establishes the miraculous deliverance that inspired it.
"The Expositor's Bible: The Book of Exodus"
G. A. Chadwick
Anyway, Tolstoy authenticates himself in this novel as a past master of realism, particularly in his utterly convincing depictment of Russian soldier life.
"Prophets of Dissent Essays on Maeterlinck, Strindberg, Nietzsche and Tolstoy"
Otto Heller
He is also keeper of the great seal of the state, and authenticates state documents, commissions, etc.
"Studies in Civics"
James T. McCleary