CORRESPONDENCE is arranged in seven sections: General, 1913-1925; General, 1931-1946; General, 1947-1957; Topical, 1947-1957; Family; Nora Sigerist Beeson; and Collected Letters. Each section is arranged alphabetically by writer except that the letters in the Topical section are alphabetical by subject. There are cross-references from the three General sections to the other sections of this series and to various locations in Series II. There are no cross-references from one Generalsection to another.