The collection consists of correspondence, manuscripts, a document, and printed materials. Cataloged materials include two poems by Igorʹ Severi︠a︡nin, Elena Miller, and letters from Nikolaĭ K. Roerich to Father Georgiĭ Spasskiĭ. Correspondence contains mostly letters to Elena Miller, and also includes letters to Archimandrite Afanasiĭ and others. There is also a letter dated 1919 from abbot (igumen) Serafim of the Belogorskiĭ monastery to Grand Prince Nikolaĭ Nikolaevich, describing the conditions and mood of the peasants in the Perm ́area. Manuscripts are by various persons on religious and political topics. Printed materials consist primarily of monarchist and religious mimeographed materials, fliers and pamphlets.

The papers consist primarily of the Kosatkin-Rostovskiĭ's memoirs. His manuscript memoirs (150 p.) discuss his life up to 1906. Her typescript memoirs (440 p.) discuss her childhood, career as an actress in St. Petersburg, 1917-1918 in Petrograd, and the emigration in France. Also included are his diary for June-July 1940; a few letters written to him; clippings of his newspaper articles (many signed with the pseudonym "Antar"); and a book with his poetry and with essays dedicated to him; "Krestnym putem k voskresenii︠u︡" (Paris, 1948).

The collection consists of correspondence, manuscripts, personal documents, subject files and printed materials. Almost half the correspondence is from Varvara (Vali︠a︡) Shakhovskai︠a︡, his wife, from whom he was divorced in 1932 but whose friendship he enjoyed until his death in 1961. A large portion of the manuscripts is in the form of a diary which, for the years 1919-1920, relates the activities of the Cuirassiers during the Civil War. The subject files deal exclusively with the Cuirassier Regiment and its veterans' organization in emigration. They include minutes, official mailings, regiment songs and poems and copies of the regiment publication, "Vestnik," for the period 1928-1931.

Correspondence and memoirs of Vereshchagin. Correspondence includes letters from a number of major emigre cultural figures, such as Ivan Bunin, Matild́a Ksheshinskai︠a︡, Vasiliĭ Nemirovich-Danchenko; there are also poems by Nemirovich-Danchenko and by Nadezhda Teffi. In addition, there are letters by members of the Imperial family in exile, particularly Grand Prince Vladimir Kirillovich. Vereshchagin's memoirs touch on such subjects as his childhood and family, the Imperial Corps of Pages, cultural life in St. Petersburg and Petrograd, and the early 1920's in Petrograd and Moscow. In addition, there is a pamphlet of poems by Vereshchagin"Stikhi" (1955).