The Passion of St Edmund by Abbo of Fleury is in Early Medieval Books.
Corolla Sancti Eadmundi: The Garland of Saint Eadmund King and Martyr. New York: E.P.Dutton and Company: 1907. [pp. 7-59]
X. The saintly man [Edmund "The Martyr" King East Anglia] had but just ended his speech, and the soldier taken his departure from the palace to carry back the answer, when, behold! Inguar met him, and bade him waste no words in declaring the final purport of the king's reply. As the messenger obeyed this behest, the tyrant ordered the crowd of his attendants to form a ring round the place, and to take the king alone prisoner, as showing palpable defiance of the conditions laid down. Then the holy King Eadmund was taken in his palace, as a member of Christ, his weapons thrown aside, and was pinioned and tightly bound with chains, and in his innocence was made to stand before the impious general, like Christ before the governor Pilate, and eager to follow in the footsteps of Him who was sacrificed as a victim for us. And so in chains he was mocked in many ways, and at length, after being savagely beaten, he was brought to a tree in the neighbourhood, tied to it, and for a long while tortured with terrible lashes. But his constancy was unbroken, while without ceasing he called on Christ with broken voice. This roused the fury of his enemies, who, as if practising at a target, pierced his whole body with arrow-spikes, augmenting the severity of his torment by frequent discharges of their weapons, and inflicting wound upon wound, while one javelin made room for another. And thus, all haggled over by the sharp points of their darts, and scarce able to draw breath, he actually bristled with them, like a prickly hedgehog or a thistle fretted with spines, resembling in his agony the illustrious martyr Sebastian. But when it was made apparent to the villainous Inguar that not even by these means could the king be made to yield to the agents of his cruelty, but that he continued to call upon the name of Christ, the Dane commanded the executioner to cut off his head forthwith. The king was by this time almost lifeless, though the warm life-stream still throbbed in his breast, and he was scarcely able to stand erect. In this plight he was hastily wrenched from the blood-stained stem, his ribs laid bare by numberless gashes, as if he had been put to the torture of the rack, or had been torn by savage claws, and was bidden to stretch forth the head which had ever been adorned by the royal diadem. Then, as he stood in all his meekness, like a ram chosen out of the whole flock, and desirous of hastening by a happy exchange this life for eternity, absorbed as he was in the mercies of God, he was refreshed by the vision of the light within, for the satisfaction of which he earnestly yearned in his hour of agony. Thus, while the words of prayer were still on his lips, the executioner, sword in hand, deprived the king of life, striking off his head with a single blow. And so, on the 20th November [869], as an offering to God of sweetest savour, Eadmund, after he had been tried in the fire of suffering, rose with the palm of victory and the crown of righteousness, to enter as king and martyr the assembly of the court of heaven.