Alternative successions of the English and British crown of the "Clarence" claim also draw on the debated validity of Edward IV's marriage to Elizabeth Woodville, which allows them to argue that, even if Edward was legitimate, his children were not. Another point is that Henry VI passed a law in 1470 that should both he and his son Edward of Westminster die without further legitimate issue, the crown was to pass to "Clarence", as Henry had placed an attainder upon Edward IV. When Henry died in 1471 (Prince Edward having died in battle shortly before), "Clarence" (who could claim descent from John of Gaunt, as could his wife
Johann Heynlin Sallust (1470-1471), the third the "Orationes" of Bessarion (1471), and the fourth was Fichet's own "Rhetorica" in 1471. The number of the works which they published from 1470 to 1472 amounts to some thirty works. At the end of 1472 or at the beginning of 1473, Heynlin and Fichet left the Sorbonne to settle on Rue Saint-Jacques. Two of their apprentices, Pierre de Kaysere (Petrus Caesaris) and Jean Stoll, established around the same time and on the same street their own competing printing press, with the emblem of the "Soufflet-Vert". The German humanist Johann Reuchlin attached himself to Heynlin, whom