Duchy of Cornwall from Duchy income, assisted by Grants-in-aid from the Queen. If there is no duke (for example, if the monarch does not have any male children) the duchy income reverts to the monarch and the annual Sovereign Grant is reduced annually by the amount of the duchy's income. The duchy was established on 17 March 1337 by the Royal Great Charter out of the former Earldom of Cornwall by Edward III for his son, Edward, Prince of Wales, the "Black Prince", who became the first Duke of Cornwall. The charter established that the Duke of Cornwall is to be the eldest
Edward the Black Prince black Prince". Raphael Holinshed uses it several times in his "Chronicles" (1577); and it is also used by William Shakespeare, in his plays "Richard II" (written "c".1595; Act 2, scene 3) and "Henry V" ("c".1599; Act 2, scene 4). In 1688 it appears prominently in the title of Joshua Barnes's "The History of that Most Victorious Monarch, Edward IIId, King of England and France, and Lord of Ireland, and First Founder of the Most Noble Order of the Garter: Being a Full and Exact Account Of the Life and Death of the said King: Together with That of his Most