The Ellsworth family materials include deeds, property information, stock certificates, and photographs. Of note is a large volume that records the genealogy of the descendants of John Ellsworth of Torrington, Connecticut, compiled by Grace Ellsworth Forbush, John Ellsworth's great great granddaughter. The volume tracks the Ellsworth genealogy from the 1700s. The Ellsworth materials also include a letter from John Ellsworth (1762-1848) to his son John Ellsworth (1795-1875), who was living in Hudson. The letter discusses John, Sr.'s daily activities and his plans to move to Ohio. Other material includes personal correspondence of Augustus, Elijah, Elisha, Emma, and Harriet Ellsworth. The diaries of Elijah and Elisha can also be found in the collection. Photographs include portraits of the Ellsworth family as well as a daguerreotype of Elizabeth Oviatt Ellsworth (stored with library daguerreotype storage).