Then did they wheel their horses far apart, and running them together, the strange knight shivered Sir Griflet's spear to fragments, and smote him through the shield and the left side, and broke his own spear into Sir Griflet's body, so that the truncheon stuck there, and Sir Griflet and his horse fell down. But when the strange knight saw him overthrown, he was sore grieved, and hastily alighted, for he thought that he had slain him. Then he unlaced his helm and gave him air, and tended him carefully till he come out of his swoon, and leaving the truncheon of his spear in his body, he set him upon horse, and commended him to God, and said he had a mighty heart, and if he lived would prove a passing good knight. And so Sir Griflet rode to the court, where, by aid of good physicians, he was healed in time and his life saved. At that same time there came before the king twelve old men, ambassadors from Lucius Tiberius, Emperor of Rome, and demanded of Arthur tribute unto Cæsar for his realm, or else, said they, the emperor would destroy both him and his land. To whom King Arthur answered that he owed the emperor no tribute, nor would send him any; but said he, "On a fair field I will pay him his proper tribute--with a sharp spear and sword; and by my father's soul that tribute shall he take from me, whether he will or not." So the ambassadors departed passing wroth, and King Arthur was as wroth as they. But on the morrow of Sir Griflet's hurt, the king commanded to take his horse and armor secretly outside the city walls before sunrise of the next morning, and, rising a long while before dawn, he mounted up and took his shield and spear, and bade his chamberlain tarry till he came again; but he forbore to take Excalibur, for he had given it for safety into charge of his sister, Queen Morgan le Fay. And as the king rode at a soft pace he saw suddenly three villains chasing Merlin and making to attack and slay him. Clapping spurs to his horse, he rushed towards them, and cried out in a terrible voice, "Flee, churls, or take your deaths;" but they, as soon as they perceived a knight, fled away with the haste of hares. "O Merlin," said the king; "here hadst thou been killed, despite thy many crafts, had I not chanced to pass." "Not so," said Merlin, "for when I would, I could have saved myself; but thou art nearer to thy death than I, for without special help from heaven thou ridest now towards thy grave." And as they were thus talking, they came to the fountain and the rich pavilion pitched beside it, and saw a knight sitting all armed on a chair in the opening of the tent. "Sir knight," said King Arthur, "for what cause abidest thou here? to joust with any knight that passeth by? If so, I caution thee to quit that custom." "That custom," said the knight, "have I followed and will follow, let whosoever will say nay, and if any is aggrieved at it, let him who will amend it." "I will amend it," said King Arthur.