Typescripts (many with handwritten annotations) and handwritten notes on etymologies of ethnonyms, names of places and regions, and surnames; his "Adyghe theory"; draft for a Ukrainian etymological dictionary; and other related topics. Also includes a small number of letters.

Typescripts, primarily of articles on topics of politics, literature, linguistics, and Ukrainian scholarship, many with handwritten annotations, corrections, and additions. Also includes a few short fiction works and poetry, as well as occasional correspondence with publishers, editorial offices, and colleagues, and reprints and newspaper clippings (often with handwritten annotations).