Who was the author of the pastel portraits of Dostoevsky’s parents? (From new searches on the writer’s genealogy)

The article introduces into scientific circulation archival documents stored in the Central State Archive of Moscow dedicated to the relatives of F. M. Dostoevsky - his great-uncle (grandmother’s older brother) Vasily Mikhailovich Kotelnitsky and his wife Nadezhda Andreevna, nee Rumyantseva. This is a metric certificate of the wedding on February 4, 1806 in the Transfiguration Church of Moscow, as well as a marriage search compiled by the clergy of the specified church. In the last document, among the guarantors for the groom, along with Dostoevsky’s own grandfather Fyodor Timofeevich Nechaev and his brother-in-law (married to sisters) Andrey Gavrilovich Tikhomirov, the “drawing teacher” Fyodor Ivanovich Popov appears. With the involvement of other archival documents (metric records, confession sheets), the author of the article substantiates that this person is the artist Popov (whose name has remained unknown to this day), who in 1823 painted the famous pastel portraits of Maria and Mikhail Dostoevsky - the parents of the writer - and who, according to Andrei Dostoevsky, was in some kind of relationship with their mother, Maria Fedorovna. The article also provides other data (approximate age, places of service) about the artist Fyodor Ivanovich Popov and his wife Evlampia Nikolaevna (nee Chestnova or Chesnova).