Correspondence, manuscripts, notes, and printed materials of Georgiĭ P. Benningsen, brother of E.P. Benningsen and, in the emigration, an associate of Vladimir Burt︠s︡ev. Much of the correspondence consists of letters to Georgiĭ Benningsen by Burt︠s︡ev (69 letters from the 1920s). Manuscripts include Benningsen's memoirs about Burt︠s︡ev, copies of Burt︠s︡ev's (apparently published) memoirs, and notes. Printed materials are chiefly clippings on various topics. There are also scattered issues of 1917 Russian newspapers ("Nash Vek," "Russkoe Slovo"), and an autographed copy of Burt︠s︡ev's 1919 edition of Griboedov's "Gore ot uma."

Correspondence, manuscripts, documents, photographs and printed materials of Unkovskiĭ. The correspondence includes letters from such individuals as Emile Baës, Vladimir Burt︠s︡ev, Nikolaĭ Evreĭnov, Galina Kuznet︠s︡ova, Boris Lazarevskiĭ, Alekseĭ Remizov, Ivan Shmelov, Boris Zaĭt︠s︡ev, and Leonid Zurov. Nearly all the manuscripts are by Unkovskiĭ, and include essays, stories, and excerpts from his memoirs, many of which were published in emigre journals. There are a number of scrapbooks containing clippings of his articles. In addition, the collection contains galleys of books by Unkovskiĭ, and copies of some of his full-length works, including "Ikary" (1942) and "Andreĭ Klinskiĭ" (1940).