The original filing schemes have been maintained, as have the original file headings, except for those supplied in brackets. Misspellings in the original file headings have been corrected.
Arrangement is chronological, either by an individual year or a range of years.
There are some overlaps in this system due to Nabokov's maintenance of files at different locations. 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.