Lawyer, businessman and U.S. secretary of the treasury. Correspondence, family papers, subject files, business, legal, and financial papers, speeches and writings, and miscellaneous material relating primarily to MacVeagh's service in the cabinet of William H. Taft and to the MacVeagh (McVey) and Eames families, Chicago social and civic affairs, the Franklin MacVeagh & Company wholesale grocery business, and other personal and business matters.

Civic leader and founder of the National Council of Jewish Women. Correspondence, organizational records, speeches and writings, biographical and genealogical material, family papers, photographs, a scrapbook, and printed matter document Solomon’s founding of the National Council of Jewish Women in 1893 and many facets of the organization’s development through the end of World War II.