Nabokov also had mail forwarded to him while he traveled and filed it at locations other than where it was addressed. Within the chronological order, files are arranged alphabetically. There are inconsistencies in this arrangement due to filing over extended periods by various persons at the different locations previously mentioned. Letters are sometimes filed by personal name and sometimes by corporate name, even when it is the same correspondent. Correspondence is also filed under generic letter headings in some years then under specific subject heading in others, and sometimes both in the same year.
Materials are in chronological or reverse chronological order within each alphabetic file.
Topics represented in the Correspondence Series include the Congress for Cultural Freedom, musical works by Nabokov and others, festivals, Nabokov's family, finances, and health, and official business with academic, government, and private organizations. In addition to typed and handwritten correspondence, the files contain telegrams, news clippings, conference papers, reports, minutes, brochures, photographs, and small amounts of written music. These letters have been placed in protective sleeves and should be handled with care. Most of the Stravinsky letter are in Russian. There is also a large volume of correspondence from A. Z. Propes.