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
S-III J-2 engines. The upgraded S-I in the C-3 was replaced by a new stage powered by two F-1s. By 1962, consideration of the Saturn C-2 and C-3 vehicles were dropped entirely. The Saturn C-4 was briefly considered (4xF-1 plus 4xJ-2 plus 1xJ-2) before being replaced by the Saturn C-5, which provided a greater payload margin for lunar missions. The S-II designation was now applied to the 2nd stage of the C-5. S-III The S-III (pronounced "ess three") was a proposed third stage of the early Saturn C designs for a five-stage Saturn launch vehicle. The Saturn C configurations were based