Publications, correspondence, and journals from members of the Del Mar family.

Clippings, correspondence, genealogical information, personal records, and an unpublished manuscript on Lucien Maxwell, one of the largest private landowners in United States history.

Correspondence, legal papers, travel writings and ephemera, drawings, sheet music, stamps, foreign currency, journals, photographs, glass negatives, and slides from the Blackwelder, Del Mar, and MacCoy families, who were connected by marriage. The families were avid travelers, artists, and writers, and were prominent in Chicago, St. Louis, and New York.