The Eli and Mahalah Jay collection contains material regarding their lives and families from roughly the 1840s to the early 1900s. The major strength of the collection is its correspondence section including Jay family correspondence, Ballard correspondence, and Mahalah Jay's Missionary correspondence. The collection also includes journals, addresses, compositions, and essays that express the Jays opinions on many topics. This is a rich collection for nineteenth century Quakerism.