ANTHONY DENT (editor), The horse through fifty centuries of civilization, London, Phaidon Press, 1974, 4to, pp. 288, illus., £8.95. For more than five thousand years until about sixty years ago, the history of the horse was the history of man. Although the dog has been man's best animal friend, the horse has been much more a part of his civilization than any other of his domesticated animals. A...