These papers provide extensive biographical information about Gray as well as unique and valuable documentation of the merger between Congregational Christian Churches and the Evangelical and Reformed Church to form the United Church of Christ in 1957. Henry David Gray (1908-1994) was a Congregational minister who served churches in South Hadley, Massachusetts, (1935-1939), South Pasadena, California (1942-1955), Hartford, Connecticut (1955-1970), and others. He was active in youth work, leading eight "odysseys" overseas and coordinating youth assemblies. He was one of the founders of the National Association of Congregational Christian Churches, the group of continuing Congregationalists formed following the merger of the Congregational Christian Churches and the Evangelical and Reformed Church to form the United Church of Christ in 1957.