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 four H-1 engines with a single F-1 engine. In December 1959, the Silverstein committee (formally known as the "Saturn Vehicle Evaluation Committee") decided to skip development of the Saturn A and B configurations and go straight to the Saturn C configurations, which provided greater payload lifting power. NASA HQ accepted the recommendations of the Silverstein Committee and forwarded them to MSFC in Hunstville. Huntsville concurred, but dropped the S-III stage. So, by end of 1960 the S-III stage disappeared from the developing Saturn C configurations. In the Saturn C-2, the S-III stage was replaced by the S-II stage, with 4