Then spake a tall and stately man, of noble and flowing speech, saying that it was a marvel that so vast a host should be assembled in so narrow a space, and that it was a still greater marvel that those should be there at that time who had promised to be by mid-day in the battle of Badon, fighting with Osla Gyllellvawr. “Whether thou mayest choose to proceed or not, I will proceed.” “Thou sayest well,” said Arthur, “and we will go altogether.” “Iddawc,” said Rhonabwy, “who was the man who spoke so marvellously unto Arthur erewhile?” “A man who may speak as boldly as he listeth, Caradawc Vreichvras, the son of Llyr Marini, his chief counsellor and his cousin.” Then Iddawc took Rhonabwy behind him on his horse, and that mighty host moved forward, each troop in its order, towards Cevndigoll. And when they came to the middle of the ford of the Severn, Iddawc turned his horse’s head, and Rhonabwy looked along the valley of the Severn. And he beheld two fair troops coming towards the ford. One troop there came of brilliant white, whereof every one of the men had a scarf of white satin with jet-black borders. And the knees and the tops of the shoulders of their horses were jet-black, though they were of a pure white in every other part. And their banners were pure white, with black points to them all. “Iddawc,” said Rhonabwy, “who are yonder pure white troop?” “They are the men of Norway, and March the son of Meirchion is their prince. And he is cousin unto Arthur.” And further on he saw a troop, whereof each man wore garments of jet-black, with borders of pure white to every scarf; and the tops of the shoulders and the knees of their horses were pure white. And their banners were jet-black with pure white at the point of each. “Iddawc,” said Rhonabwy, “who are the jet-black troop yonder?” “They are the men of Denmark, and Edeyrn the son of Nudd is their prince.” And when they had overtaken the host, Arthur and his army of mighty ones dismounted below Caer Badou, and he perceived that he and Iddawc journeyed the same road as Arthur. And after they had dismounted he heard a great tumult and confusion amongst the host, and such as were then at the flanks turned to the centre, and such as had been in the centre moved to the flanks. And then, behold, he saw a knight coming, clad, both he and his horse, in mail, of which the rings were whiter than the whitest lily, and the rivets redder than the ruddiest blood. And he rode amongst the host. “Iddawc,” said Rhonabwy, “will yonder host flee?” “King Arthur never fled, and if this discourse of thine were heard, thou wert a lost man. But as to the knight whom thou seest yonder, it is Kai. The fairest horseman is Kai in all Arthur’s Court; and the men who are at the front of the army hasten to the rear to see Kai ride, and the men who are in the centre flee to the side, from the shock of his horse. And this is the cause of the confusion of the host.”