The bulk of the Jenkins family papers consist of letters written to and from various members of the Jenkins family, including Gus and Martha Jenkins, their daughter Betty, Gus' two brothers, Arthur (A. G.) and Charles (Charlie), and Gus' cousins, Blanche and Lula. The collection also includes one folder of miscellaneous papers.

Arthur's correspondence includes letters that he wrote to Gus while living at home in New Milford, Ohio and also while a soldier for the American Expeditionary Forces. Betty Jenkins' correspondence consists primarily of letters written to her parents while a student at Ohio Wesleyan University. Charlie's letters were written to Gus while living in New Milford, Ohio; Letters written to Charlie from Gus and Arthur are also included in Charlie's correspondence file. The bulk of the collection comprises letters that Gus and Mattie wrote to each other before they were married while living in separate cities. The collection also includes a few letters from Gus' cousins Blanche and Lula of Bucklin, Missouri, some of Mattie's correspondence regarding business activities of the Order of the Eastern Star, and many addressed and stamped envelopes missing the enclosed correspondence. The empty envelopes have been kept with the collection to document some of the additional correspondents and acquaintances of the Jenkins family.

The collection also includes an announcement for a Hudson Garden Club meeting, Jenkins materials photocopied from the Garman papers, and three railroad tickets issued to G. E. Jenkins.