Quoted by Charu Chandra Banerjee in a speech at Dhaka Purva Bangla Brahmo Samaj; "Brahmananda Keshub Chunder Sen: Testimonies in Memoriam" compiled by G.C.Banerji, Allahabad, 1934.
Robert Green Ingersoll (1889). “The Limitations of Toleration: A Discussion Between Robert G. Ingersoll, Frederic R. Coudert, Stewart L. Woodford, Before the Nineteenth Century Club, of New York, at the Metropolitan Opera House”