The American Institute for Christianity was incorporated in 1923 to enable the planning and production of a proposed 12 volume American Encyclopaedia of Christianity. Denominational councilors, writers, editors and supporters were contacted across the USA. The Institute was unable to attract adequate funding to produce the Encyclopaedia. The bulk of the Records consist of planning documents and correspondence.

American Committee for Armenian and Syrian Relief established 1915 to respond to Armenian Genocide. Millions of dollars raised and distributed. Scope expanded after World War One, was incorporated through Act of Congress and renamed Near East Relief in 1919. Collection offers first-hand, detailed accounts of those in affected areas.

Includes letters, documents, pamphlets, clippings and ephemera collected by Rockwell and relating to his teaching, research, and library careers. Roll books, lecture materials, student papers related to his teaching on Congregational history and polity, and his work in the Union Theological Seminary library.

Includes letters, documents, pamphlets, and many manuscript notes by Rockwell.