The horse as litterateur is an obvious and ripe subject for serious inquiry. Space limitations, alas, preclude a full exegesis of the roman à clop, so a brisk lap around the track will have to suffice.Over the course of equine evolution, horses have had to overcome enormous obstacles to verbal and written communication. Verbal skill first manifest itself during the 1940s with the discovery of a talking mule within the U.S. Armed Forces stationed in the Pacific during World War II who acted as aide-de-camp for a hapless Marine lieutenant. The story was broken in a 1950 documentary:The mule later...