The collection contains a manuscript (10 p.) entitled"Velikai︠a︡ kni︠a︡gini︠a︡ Anastasii︠a︡" and a memoir (54 p.) that deals with Makhonin's education at the Naval Engineering Academy in Kronstadt, Makhonin's service in the navy during World War I, his mission to England to inspect the production of war materials for Russia, his service in the Volunteer Army in the south of Russia during the Civil War, his work with the American Red Cross in Crimea, and information on General Krasnov's Cossack Army, which collaborated with the Germans during World War II.

Correspondence, documents, diaries and notebooks, photographs, printed materials and memorabilia of Olga Ivanovna Subbotina (or Soubbotine, 1886-1963), her grandmother, Mariia Sergeevna Benckendorff, and her sister, Elizaveta Ivanovna Taube (Mrs. Harold Roberts). The correspondence includes letters and telegrams of Aleksandra Fedorovna, Empress of Russia. The letters of Mariia Benckendorff's son, Vasilii Dolgorukov, provide information about the Imperial family in 1916-1918. There are diaries and notebooks of Marii Benckendorff, Pavel Konstantinovich Benkendorff, Ol'ga Subbotina and Elizaveta Taube. Among the documents are IDs, birth and marriage certificates, passports, wills, etc. Financial and legal documents include a file entitled "Claim against the National Bank of New York", which contains material about the exile of the Imperial family to Tobolsk and Ekaterinburg, as do other folders. There are photographs of immediate and extended family members, Nicholas II and his family and European royalty. There is also family and Alexandra Fedorovna's, Empress of Russia, memorabilia.