The Gathorne-Hardy, J., mss., 1705-2017, consist of the correspondence, family materials, journals, and manuscripts of writer Jonathan Gathorne-Hardy, 1933-2019.
The Ege mss. II, 1240-1923, consists of Otto Ege's Original Leaves from Famous Books - Eight Centuries portfolio of leaves collected from books deemed historically significant.
The Blair, M.A.I. mss., 1684-1897, consists of letters and documents collected by art collector and benefactor Mary Anne Italia Mitchell Blair, 1855-1940.
The U.S. History mss., 1612-1977, consist of individual items acquired separately either as a gift, purchase, transfer, or removal from a variety of sources, relating to the United States. Additions continue to be made.
The Jonathan Krause Rare Newspaper and Magazine Collection consists of approximately 900 original issues of historical newspapers and magazines, with a focus on late 18th- and early 19th-century American publications.