This sub-series contains the bulk of the Li correspondence and covers all subjects. This sub-series is arranged alphabetically in a series of chronological runs. Some of the time periods have overlapping years and some of the alphabetic runs for a specific date range are incomplete. Letters are filed alphabetically by correspondent though some letters especially recommendation letters are filed under the name of the subject. There are miscellaneous alphabetical by letter files as well as name files. These are filed at the beginning of each letter (i.e. Misc-B, comes before Baker, A, but after the A's for the same time period). Researchers looking for all the letters from a specific person will need to check each of the date ranges for the person's name as well as the miscellaneous by letter files. A single correspondent may have a separate file in one date run but be found amongst the miscellaneous by letter in another. All individually named folders from the Li files have been retained and new ones made for writers filed in the miscellaneous that had a significant number of letters. Letters from the same person may appear in company/organization files, under their own name or both and vary between time periods. Significant Chinese language materials will be found in this sub-series.

The multiple date runs and inconsistently named files appear to reflect the filing systems of the different secretaries who maintained the HRL files.

The time periods are: