Doctor Allen Says—The Challenge of Sir Francis Campbell

Craik Dinah Mulock . “Light in Darkness” in Plain Speaking (by the author of John Halifax, Gentleman). London, 1882. Same article in Good Words. London, September, 1873.

Eaton Hon John . The Royal Normal College, London, in Report of United States Commissioner of Education, 1900, Vol. 1, Chapter IX.

Mannix John Bernard . Sir Francis Campbell, LL. D., in Heroes of the Darkness, London.

Stead William T ., Campbell F. J Dr. ., in Review of Reviews. London, August 15, 1898.