A hero of the Civil War, archaeographer Nikita Gudoshnikov spent his whole life pursuing one goal. On battlefields against the White Guards, under fascist bombs, and in Old Believer hermitages, he saved ancient books and sought proof that writing in Rus' had appeared long before the arrival of the brothers from Thessalonica, Cyril and Methodius. And once he almost found it — he saw with his own eyes a pre-Christian work by the chronicler and bard Divey…