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 Germans and the first division of the army which followed were thrown into disorder; then the English force in ambush charged the second division on the flank, and as it began to waver the English men-at-arms mounted their horses, which they had kept near them, and charged down the hill. The prince kept Chandos by his side, and his friend did him good service in the fray. As they prepared to charge he cried: "John, get forward; you shall not see me turn my back this day, but I will be ever with the foremost", and then he shouted to