Употребление буквы в Милятинoм евангелии

This study examines the usage of the letter in the Milyatin Codex (from the late 12th or early 13th century), which was written in Old Russian. The Codex contains several examples that reflect the changes of the sound marked by in the Proto-Slavic clusters *tert, *telt, and its usage in various morphemes. The analysis demonstrates some Old Russian features, the manifestation of the eastern Church Slavic orthographic norm, and the Novgorod origin of the Codex. The study contributes to a better understanding of the changes in the Russian phonological system