Unitarian minister, anti-imperialist, and advocate of independence for India. Extensive professional and family correspondence, diaries, sermons, manuscripts of books and articles, research notes, topical file on India, printed material, newspaper clippings, and miscellanea; also papers concerning his career first as a Baptist minister, later a Unitarian minister in Ann Arbor, Michigan and elsewhere, including his involvement in the Western Unitarian Conference.
The Sunderland papers are very complete for the early years of his career (1868-1887). The collection is divided into the following thirteen series: Correspondence, undated and 1868-1936, Visual Materials, Student papers and notebooks, Church and Ministerial Activities, Western Unitarian Conference, Diaries, Notebooks, etc., Sermon file, Manuscripts of Books and Articles, Research Notes and Manuscripts, Printed Materials, Topical Files on India, Miscellaneous Papers and Notebooks, Biographical/Autobiographical Material, and Topical File.