Sir Tristram could in no wise, of course, neglect this summons, for that would have been the direst disgrace to him, and never more in all his life would he have been able to show himself anywhere but as a treacherous and loathly knight, and, though it broke his heart to send her from him, La Belle Iseult loved him too well to have him so disgrace himself.

So they parted; and a sadder parting never had been in this world, for they knew with a sure and certain knowledge that never again would they be allowed to meet; and their hearts were full of a love and sorrow almost too great to be borne. With tears and kisses they said farewell, vowing each to be true to the other till death, and after.

So Sir Tristram rode away into Wales, and Queen Iseult being discovered by King Mark, was made to return to him, only to be made a prisoner in the great grim castle at Tintagel, where all day long she sat sad and lonely, looking out over the sea, and musing sadly on all the bitterness life had held for her and for her lover. And her husband, jealous, wrathful, never slackened his watch over her, night or day.

A harder lot was Iseult's than her lover's, for he had change and action to distract his thoughts, and all the excitement of battle; but she had nothing to do but sit and think on all that might have been, until her heart was near to breaking.

Meanwhile, Sir Tristram arrived in Wales and met the monster Urgan, a huge, hideous creature with no notion of fighting, or chivalry, for the moment he beheld Sir Tristram, he rushed upon him, and would have dashed him to the ground, but that Sir Tristram by good hap saw what was coming, and swerved aside so that the blow fell harmless. And while the giant roared with rage and mortification, and tried to recover his balance, Sir Tristram swiftly drew his sword, and swinging it lightly round his head, cut the monster's right hand clean off at the wrist with one sharp stroke.

Maddened by the pain, Urgan fumbled with his left hand until he drew from his belt a short steel dagger which had been tempered with sorcery, and springing on Sir Tristram they closed together, and long and fiercely they fought until the cliffs trembled with the struggle, and the ground was sodden with blood.

Great ado had Sir Tristram to avoid the huge bulk of the giant, and greater and greater grew the strain upon his strength, until a blow from him sent the giant rolling over in the gory mud. He was soon on his feet again, but the moment had given Sir Tristram time to get his breath. Then they closed again, and the blows fell faster and more furiously than ever. The giant's groans of rage and excitement might have been heard for miles around, while the earth flew about them until they could scarce be seen. Between every joint of their corslets the blood ran down in streams, but the sight only infuriated them the more.

At last, with a fierce roar between bitter laughter and pain, Urgan smote Sir Tristram with such fury that he cracked his shield in half, and then before Sir Tristram could recover himself he smote him again so that he would have killed him had not the blow by great good chance turned aside. But, turning aside as it did, it gave Sir Tristram the chance he coveted, and rushing in on the giant before he had recovered his foothold, he smote him with such force and skill that he cleft him clean through; and in his agony Urgan leapt so high in the air that he fell back over the edge of the cliff, and dropped heavily into the sea.

His task accomplished, Sir Tristram got into his ship again and sailed away, and as he passed Tintagel, where his unhappy love lay a prisoner in the castle, his heart felt like to break; and his yearning for her was so great, it seemed as though it must bring her to him in spite of her jailers.

But they were parted, those two, by a fate as strong as death. And she lay immured in her castle home, while he sailed on and on, not heeding nor caring whither he went, for all that he loved dwelt on that bleak iron-bound coast, as far from him as though the whole wide world lay between them.