Saint Edmund was king of East Anglia, born about 840; died at Hoxne, Suffolk, 20th November, 870.
The earliest and most reliable accounts represent St. Edmund as descended from the preceding kings of East Anglia, though according to later legends he was born at Nuremberg (Germany), son to another wise unknown King Alcmund of Saxony. Though only about fifteen years old when crowned in 855, Edmund showed himself a model ruler from the first; anxious to treat all with equal justice, and closing his ears to flatterers and untrustworthy informers. In his eagerness for prayer he retired for a year to his royal tower at Hunstanton and learned the whole Psalter by heart, in order that he might afterwards recite it regularly.
In 870 he bravely repulsed the two Danish chiefs Hinguar and Hubba who had invaded his dominions. They soon returned with overwhelming numbers and pressed terms upon him, which as a Christian he felt bound to refuse. In his desire to avert a fruitless massacre, he disbanded his troops and himself retired towards Framlingham; on the way he fell into the hands of the invaders. Having loaded him with chains, his captors conducted him to Hinguar, whose impious demands he again rejected, declaring his religion dearer to him than his life. His martyrdom took place in 870 at Hoxne in Suffolk. After beating him with cudgels, the Danes tied him to a tree, and cruelly tore his flesh with whips.
Throughout these tortures Edmund continued to call upon the name of Jesus, until at last, exasperated by his constancy, his enemies began to discharge arrows at him. This cruel sport was continued until his body had the appearance of a porcupine, when Hinguar commanded his head to be struck off.
From his first burial-place at Hoxne his relics were removed in the tenth century to Beodricsworth, since called St. Edmundsbury, where arose the famous abbey of that name. His feast is observed 20th November, and he is represented in Christian art with sword and arrow, the instruments of his torture.
(Source: Catholic Encyclopedia – http://www.newadvent.org/cathen/05295a.htm)