Materials include a letter from John K. Kane to Jane Duval Leiper Kane, in which John professes his love to Jane and requests an answer. Written during their courtship. Date of production not identified.

Materials include a letter from John K. Kane to Jane Duval Leiper, describing his feelings for her and about his mother Elizabeth Kintzing Kane. No year on item. Dated July 13, approximately 1817-1819.

Materials include a letter from John K. Kane to Jane Duval Leiper Kane, including a parody of Alexander Pope’s “Ode to Solitude” written while journeying on a steamboat. No date on item. Date of production not identified.

Materials include an unsigned letter addressed to John K. Kane's cousin Oliver Grenville Kane, in which the author says they support the union of Jane Duval Leiper and John K. Kane (referred to as "Johnny"). The author says she has known Jane's mother for many years and knows Jane to be an upstanding young woman. No date on item. Dated approximately 1819.

Materials include a letter from John K. Kane to Jane Duval Leiper with an enclosed copy of "An Apology" written by H.K. White. John explains that he is sending this poem as an apology for overstaying his recent visit by two hours. No date on item. Possibly sent during their courtship or engagement. Date of production not identified.

Materials include a letter from John K. Kane to Jane Duval Leiper Kane (Jeanie) saying, that “Say” (possibly Thomas Say who was also a member of the American Philosophical Society) is very sick and asking if she would leave the Mills to come stay with him instead. No date on item. Date of production not identified.

Materials include a letter from John K. Kane to Jane Duval Leiper (Jeanie), saying that he boarded a steamboat, paid a visit to her house, and that supplies will be sent soon. Date of production not identified.

Materials include a letter from John K. Kane to Jane Duval Leiper Kane with advice about developing a maternal relationship with their first child, Elisha Kent Kane. Dated July 10, approximately 1821.

Letter from John K. Kane to Jane Duval Leiper Kane saying that he has only spoken about twenty words in the House session but will correct that when the District Court Law reaches the floor; he asks Jane to send him several books from his home library. Dated December 12, 1824.

Letter from John K. Kane to Jane Duval Leiper Kane saying that he has been placed on some important committees and secretly agreed to provide daily information on the House's business to John Norvell of the Franklin Gazette, a Democratic-Republican newspaper. Dated December 15, 1824.