Materials include an original letter from John K. Kane to Elisha Kent Kane. John says he is sending him some popular sketches and tells him about the current controversy regarding their ownership. John states that the option to return home is always open if Elisha is not well received in Manila. Dated May 22, 1844.

Materials include an original letter from John K. Kane to Elisha Kent Kane saying that John wrote a newspaper article on the life of James P. Polk and and George M. Dallas; he also wrote an eight-page tract about Texas and the annexation. Jane has a severe toothache, but she is otherwise fine. Dated June 14, 1844.

Materials include an original letter from John K. Kane and Thomas L. Kane to Elisha Kent Kane that tells Elisha about the riots between the Native American and Irish populations. They say that Martin Van Buren's Texas anti-annexation letter was a bombshell and they tell Elisha about the Baltimore Convention. The letter is severely damaged at the bottom. Dated May 26, 1844.

Materials include an original letter from John K. Kane and Thomas L. Kane to Elisha Kent Kane. The letter is illegible since the ink has run through the onion-skin pages and made it impossible to read. Dated August 12, 1844.

Materials include an original letter from John K. Kane to Elisha Kent Kane. The letter describes John's recent visit to a university's commencement exercises and says that Jane is the healthiest she has ever been. Dated April 11, 1845.

Materials include an original letter from John K. Kane to Thomas L. Kane. John says he is going to send Tom support money and he encourages Tom to mind his health; the second part of the letter has a more detailed description of financial matters between the two. Dated October 7, 1843.

Materials include an original letter from John K. Kane to Thomas L. Kane. The letter is incomplete, but it mentions a business trip to Washington, includes an update about the presidential race, and talks about arrangements being made by the United States government to pay back a forty million dollar debt. Dated December 1843.

Materials include an original letter from Robert Patterson Kane to Thomas L. Kane. Robert says he sent twenty-four bulletins and he tells Tom about changes to the United States Coast Survey. He says that Alexander Dallas Bache's will be in charge of ten brigades instead of one. Dated December 24, 1843.

Materials include an original letter from John K. Kane, John Kent Kane, and William Leiper Kane to Thomas L. Kane. They say they have written several letters which have not been delivered properly. John encourages Thomas to take a trip to the Mediterranean, suggesting Italy, and offering him some money for the travel expenses. Dated January 25, 1844.

Materials include an original letter from John K. Kane, Jane Duval Leiper Kane, and Robert Patterson Kane to Thomas L. Kane. In the letter they write about how Martin Van Buren's presidential prospects continue to brighten and they give him an update of recent local and national political news. Dated February 15, 1844.