Primarily corresondence of the Kenrick and Russell families. The bulk of the letters are dated 1827-1875 and are to and from William Kenrick's sister-in-law, Sylvia A. Russell. Her correspondents include her aunt Abby Ammidon, her grand-niece Sydonia Josephine Hobbins (1848-1934), and her friend Hepzibah G. Whipple. The letters of William Kenrick are dated 1814-1869 and consist of correspondence with family and friends. The collection also includes several of William Kenrick's published books on horticulture, including a second-edition copy of his The New American Orchardist (1835). There is also a leather-bound full-color fruit nursery catalog. The collection also contains letters to and from other family members as well as other miscellaneous papers and some photocopied secondary materials related to the history of horticulture.