Correspondence, manuscripts, documents, photographs, subject files, printed materials, and memorabilia of historian George Vernadsky (Georgii Vladimirovich Vernadskii; 1887-1973). Most of the collection consists of his personal and professional papers, circa 1918-1973. Sizable groups of materials also concern members of his family, especially his wife Nina (1884-1971); his father, scientist Vladimir I. Vernadskii (1863-1945); his mother Nataliia E. Vernadskaia (1860-1943); and his sister Nina V. Toll' (1898-circa 1976).

Correspondence, manuscripts, photographs, subject files, and printed materials of Evgenii Aleksandrovich Vechorin, chiefly concerning alumni of the St. Petersburg Polytechnical Institute. The catalogued correspondence includes letters from Nikolai Andreev, Petr Savitskii, Igor ́Sikorskii, Gleb Struve, and Alfred Swann, and other prominent figures. Much of the arranged correspondence is from fellow graduates of the Institute, and concerns alumni affairs. Most of the manuscripts are likewise by fellow graduates; many are memoirs, such as those by Vechorin himself, while others concern technical subjects. Among the subject files are biographical sketches of Institute graduates and files on such individuals as Petr Savitskii, Igor ́Sikorskii, and Alfred Swann. There are several photographs taken at the Institute ca. 1900 as well as photographs of Vechorin and his colleagues after emigration. The printed materials include clippings and excerpts, miscellaneous journals, and books by Vechorin and S. P. Timoshenko.

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.