Amis,   Kingsley,   "Introduction,"  in   Tennyson,   Penguin Books, 1973, pp. 7-19.

"Explanations: The Eagle," GaleNet, "Exploring Poetry," Gale Group, 2000.

James, Henry, quoted in Nineteenth-Century Literature Criticism, Volume 30, Gale, 1991, p. 203.

Kissane, James, Alfred Tennyson, Twayne Publishers, Inc., 1970.

Lockyear, Sir Norman, Tennyson as a Student and Poet of Nature, Russell and Russell, 1910.

Lucas, F. L., Tennyson, Longman Green & Co., 1957. Priestly, J. B., Victoria's Heyday, Harper & Row, 1972.

Tennyson's Poetical Works: Student's Cambridge Edition, Houghton Mifflin Company, 1898.

Thorn, Michael, Tennyson, St. Martin's, 1992.