The True Tragedy of Richard III a source for his play, though the majority tend to favour this judgement. Geoffrey Bullough treats "The True Tragedy" as a "probable source" for "Richard III", citing several commonalities (as when, in both plays, Richard calls for a horse on Bosworth Field, yet refuses to flee the battle) — though Bullough admits that the nature of the plays' relationship is "not clear." The uncertainty in dating has allowed a few commentators to propose a reversed priority, and to argue that the author (or reviser) of "The True Tragedy" may have borrowed from Shakespeare's play. Shakespeare appears to have known of
Richard S. Heyser Richard S. Heyser Richard S. Heyser (3 April 1927 – 6 October 2008), Lieutenant Colonel, USAF (Retired), was a pilot in the United States Air Force whose photographs while flying the Lockheed U-2 revealed Soviet medium-range ballistic missiles in Cuba, precipitating the Cuban Missile Crisis in October 1962. Heyser, a native of Apalachicola, Florida, joined the United States Army Air Forces in 1944, at the age of 17, after watching World War II pilots training at nearby Tyndall Field. His father was a U.S. Coast Guard Auxiliary aviator. Following the war, Heyser graduated from what would become Florida State University.