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 lane that led to his position the prince stationed his archers, who were well protected by hedges, and posted a kind of ambush of three hundred men-at-arms and three hundred mounted archers, who were to fall on the flank of the second battle of the enemy, commanded by the Charles, Duke of Normandy. At daybreak on 19 September the Black Prince addressed his little army, and the fight began. An attempt was made by three hundred picked men-at-arms to ride through the narrow lane and force the English position, but they were shot down by the archers. A body of