Correspondence, manuscripts, documents, photographs, subject files and printed material of Russian émigré writer, journalist, and Kadet Party leader Ariadna Vladimirovna Tyrkova-Williams. The collection also contains material by her husband, Harold Williams, and her son, Arkadiĭ Borman.

The collection contains RNK correspondence, documents, photographs, subject files, organizational records and printed materials. There are letters from Boris Bakhmeteff, Pavel and Petr Dolgorukov, Zinaida Gippius, Aleksandr Kutepov, Dmitrii Merezhovskii, Bernard Pares, Ariadna Tyrkova-Williams, George Vernadsky, and Petr Vrangel. There is a short essay by Aleksandra Tolstaia about her father. The manuscripts relate to political, historical and sociological issues. Most of the subject files relate to emigre organizations other than the RNK, while those of the RNK are classified into files of financial records, bulletins, minutes and lists of names and addresses. Among the printed materials are brochures and pamphlets, clippings, newspapers, and books.