In 1463 Fortescue accompanied Queen Margaret and her court in their exile on the Continent, and returned with them to England in 1471. During their exile he wrote for the instruction of the young Prince Edward his celebrated work "De laudibus legum Angliæ" ("Commendation of the Laws of England", first published posthumously around 1543), in which he made the first expression of what would later become known as Blackstone's formulation, stating that "one would much rather that twenty guilty persons should escape the punishment of death, than that one innocent person should be condemned, and suffer capitally". On the defeat of the Lancastrian party he made his submission to Edward IV, who reversed his attainder on 13 October 1471.