Sir Tristram chides Belle Isoult.

But Sir Tristram looked at the Lady the Belle Isoult with great reproach and by and by when they were together he said: "Lady, why did you betray me who I was when you had promised me not to do so?" "Sir," she said, "I meant not to betray you, but in the joy of your victory I know not very well what I said." "Well," said Sir Tristram, "God grant that no harm come of it." She said, "What harm can come of it, Messire?" Sir Tristram said: "I may not tell you, Lady, but I fear that harm will come of it."

Anon the Queen of Ireland came and said: "Tramtris, one so nigh to death as you have been should not so soon have done battle as you have done. Now I will have a bain prepared and you shall bathe therein, for you are not yet hale and strong."

"Lady," said Tristram, "I do not need any bain, for I believe I am now strong and well in all wise."

"Nay," said the Queen, "you must have that bain so that no ill may come to you hereafter from this battle which you have fought."

So she had that bain prepared of tepid water, and it was very strong and potent with spices and powerful herbs of divers sorts. And when that bain was prepared, Sir Tristram undressed and entered the bath, and the Queen and the Lady Belle Isoult were in the adjoining chamber which was his bed-chamber.

The Queen of Ireland beholds Sir Tristram's sword.

Now whilst Sir Tristram was in that bath, the Queen and Belle Isoult looked all about his chamber. And they beheld the sword of Sir Tristram where it lay, for he had laid it upon the bed when he had unlatched the belt to make himself ready for that bath. Then the Queen said to the Lady Belle Isoult, "See what a great huge sword this is," and thereupon she lifted it and drew the blade out of its sheath, and she beheld what a fair, bright, glistering sword it was. Then in a little she saw where, within about a foot and a half from the point, there was a great piece in the shape of a half-moon broken out of the edge of the sword; and she looked at that place for a long while. Then of a sudden she felt a great terror, for she remembered how even such a piece of sword as that which had been broken off from that blade, she had found in the wound of Sir Marhaus of which he had died. So she stood for a while holding that sword of Sir Tristram in her hand and looking as she had been turned into stone. At this the Lady Belle Isoult was filled with a sort of fear, wherefore she said, "Lady, what ails you?" The Queen said, "Nothing that matters," and therewith she laid aside the sword of Sir Tristram and went very quickly to her own chamber. There she opened her cabinet and took thence the piece of sword-blade which she had drawn from the wound of Sir Marhaus, and which she had kept ever since. With this she hurried back to the chamber of Sir Tristram, and fitted that piece of the blade to the blade; and lo! it fitted exactly, and without flaw.

The Queen assails Sir Tristram.