Materials include a letter from Elias Kane to his nephew John K. Kane talking about business in Illinois and saying that the laws and system for debt collection are miserable. Dated March 13, 1825.

Materials include a letter from John K. Kane to Jane Duval Leiper Kane telling her that he will return tomorrow and he has had some discussions with Jane's father about an issue with the law. Dated 1820.

Materials include a letter from John K. Kane to Jane Duval Leiper Kane saying that he has arrived in New York and that a man who probably hoped to court Jane was asking about her, but didn't know that John had married her. Dated August 10, 1820.

Materials include a letter from John K. Kane to Jane Duval Leiper Kane saying that he arrived at Newbold's Landing last night. Dated approximately 1826.

Materials include a letter from Elias Kane to John K. Kane saying that he feels disgusted with himself for something he did and that he wants to conduct himself in a manner that his children will be proud of. He also says that he voted in favor of Henry Clay's nomination. Dated June 13, 1825.

Materials include a letter from John K. Kane to his sister Alida Van Renneselaer Kane Constable saying that he is giving her 1,050 dollars. One thousand dollars for her annuity and fifty dollars for interest money that he had invested. There is a note written by Alida on the back saying that the money was invested in Harelton Co. Dated June 12, 1854.

Materials include a letter from John K. Kane to his sister Alida Van Renneselaer Kane Constable saying that he is immersed in court duties and landscaping plans. The original envelope is included with the letter. Dated October 29, 1840.

Materials include a letter from John K. Kane to Alida Van Renneselaer Kane Constable about the death of their uncle Elias Kane, the death of John's nephew, William Taylor, and the state of Jane's health. Dated October 10, 1840.