when sir tristram had come back to cornwall, he abode some time at the court of king mark. now in those days the cornish knights were little esteemed, and none less than mark himself, who was a coward, and never adventured himself in fair and open combat, seeking rather to attack by stealth and have his enemy at an advantage. but the fame of sir tristram increased daily, and all men spoke well of him. so it came to pass that king mark, knowing himself despised, grew fearful and jealous of the love that all men bore his nephew; for he seemed in their praise of him to hear his own reproach. he sought, therefore, how he might rid himself of tristram even while he spoke him fair and made as if he loved him much, and at the last he bethought him how he might gain his end and no man be the wiser. so one day, he said to tristram: "fair nephew, i am resolved to marry, and fain would i have your aid." "in all things, i am yours to command," answered sir tristram. "i pray you, then," said king mark, "bring me to wife the fair isolt of ireland. for since i have heard your praises of her beauty, i may not rest unless i have her for my queen." and this he said thinking that, if ever sir tristram set foot in ireland, he would be slain.
but tristram, nothing mistrusting, got together a company of gallant knights, all fairly arrayed as became men sent by their king on such an errand; and with them he embarked on a goodly ship. now it chanced that when he had reached the open sea, a great storm arose and drove him back on to the coast of england, and landing with great difficulty he set up his pavilion hard by the city of camelot.
presently, word was brought him by his squire that king anguish with his company lay hard by, and that the king was in sore straits; for he was charged with the murder of a knight of arthur's court, and must meet in combat sir blamor, one of the stoutest knights of the round table. then sir tristram rejoiced, for he saw in this opportunity of serving king anguish the means of earning his good will. so he betook himself to the king's tent, and proffered to take upon him the encounter, for the kindness shown him by king anguish in former days. and the king gratefully accepting of his championship, the next day sir tristram encountered with sir blamor, overthrew him, and so acquitted the irish king of the charge brought against him. then in his joy, king anguish begged sir tristram to voyage with him to his own land, bidding tristram ask what boon he would and he should have it. so rejoicing in his great fortune, sir tristram sailed once again for the irish land.