How by misadventure of an adder the battle began, where Mordred was slain, and Arthur hurt to the death. Then were they condescended that King Arthur and Sir Mordred should meet betwixt both their hosts, and everych of them should bring fourteen persons; and they came with this word unto Arthur. Then said he: I am glad that this is done: and so he went into the field. And when Arthur should depart, he warned all his host that an they see any sword drawn: Look ye come on fiercely, and slay that traitor, Sir Mordred, for I in no wise trust him. In like wise Sir Mordred warned his host that: An ye see any sword drawn, look that ye come on fiercely, and so slay all that ever before you standeth; for in no wise I will not trust for this treaty, for I know well my father will be avenged on me. And so they met as their appointment was, and so they were agreed and accorded thoroughly; and wine was fetched, and they drank. Right soon came an adder out of a little heath bush, and it stung a knight on the foot. And when the knight felt him stung, he looked down and saw the adder, and then he drew his sword to slay the adder, and thought of none other harm. And when the host on both parties saw that sword drawn, then they blew beams, trumpets, and horns, and shouted grimly. And so both hosts dressed them together. And King Arthur took his horse, and said: Alas this unhappy day! and so rode to his party. And Sir Mordred in like wise. And never was there seen a more dolefuller battle in no Christian land; for there was but rushing and riding, foining and striking, and many a grim word was there spoken either to other, and many a deadly stroke. But ever King Arthur rode throughout the battle of Sir Mordred many times, and did full nobly as a noble king should, and at all times he fainted never; and Sir Mordred that day put him in devoir, and in great peril. And thus they fought all the long day, and never stinted till the noble knights were laid to the cold earth; and ever they fought still till it was near night, and by that time was there an hundred thousand laid dead upon the down. Then was Arthur wood wroth out of measure, when he saw his people so slain from him.
Then the king looked about him, and then was he ware, of all his host and of all his good knights, were left no more alive but two knights; that one was Sir Lucan the Butler, and his brother Sir Bedivere, and they were full sore wounded. Jesu mercy, said the king, where are all my noble knights become? Alas that ever I should see this doleful day, for now, said Arthur, I am come to mine end. But would to God that I wist where were that traitor Sir Mordred, that hath caused all this mischief. Th............