Members of the Allinson family were involved in the abolition movement, and the collection includes materials from their membership in the New Jersey Society for Promoting the Abolition of Slavery, mostly from the late 18th century, as well as manumissions of enslaved people. Some of the correspondence, particularly that of Samuel Allinson, also deals with issues of slavery.
This collection contains correspondence and diaries of Samuel Rhoads, who was active in a number of reform causes. He was one of three publishers of The Non-Slaveholder, a Philadelphia monthly which appeared from 1846 to 1854. He was also a founder of the Friends of Philadelphia Free Produce Association.