Most of the collection consists of letters to Golśteĭn; there are some as well to her second husband, Vladimir A. Gol'shtein. The materials reflect Gol'shtein ties to Russian liberalism and populism and also to both French and Russian art and literature. There are groups of cataloged letters from Renʹe Arcos (15), Mykhailo Drahomaniv (52), Andrʹe Fontainas (31), Renʹe Ghil (32), Viacheslav Ivanov (17), Petr Lavrov (49), Vladimir Vernadskii (20), and Maksimilian Voloshin (29). There are also items by Jurgis Baltrušaitis, Henri Martin Barzun, Henri Bergson, Ivan Bunin, Sergei Diagilev, Paul Fort, Vladislav Khodasevich, Aristide Maillol, and Odilon Redon. Manuscripts are chiefly by Golśhteĭn, and include her memoirs on Drahomaniv. There are also poems by Voloshin and by Konstantin Bal'mont. Subject files deal with such topics as the Russian famine of 1891-92 and the Russian Liberation Committee at the time of the Civil War. There is a copy of Gol'shtein's book, "Serf Life in Russia."

The collection includes correspondence from Konstantin Balḿont, Nikolaĭ Evreĭnov, Zinaida Gippius, Georgiĭ Grebenshchikov, Vasiliĭ Maklakov, Sergeĭ Potresov and Nadezhda Teffi. There is one letter each from Boris Bakhmeteff, Vera Bunina, Aleksandr Grechaninov, Aleksandr Kuprin and Alekseĭ Tolstoĭ. The manuscripts include poems and a play scenario by Nadezhda Teffi as well as Roshchina-Insarova's autobiographical essays and article about Sergeĭ Lifar.́ In addition, there are three scrapbooks containing clippings and programs of Roshchina-Insarova's performances, and approximately 40 photographs of her.