Sir Tristram, sad and troubled, went apart, and rode into a forest, for now he knew that he had done himself an ill turn. The lady he loved and whom he wanted to wife for himself he had now promised to woo for another.
As he rode moodily through the forest drive, a knight came swiftly riding on a great horse, its flanks flecked with the foam of its speed.
'Fair knight,' said the stranger, 'will ye of your courtesy tell me where I may quickly come at a knight called Sir Tristram of Lyones?'
'I am he,' said Tristram. 'What would ye?'
'I thank Heaven that hath led me to you, sir knight,' said the other. 'Here is a message from my master, King Anguish of Ireland, who is in dire peril of honour and life, and craves aid of you for the love that hath been atween you.'
Sir Tristram, much marvelling, took the parchment and read: 'These to you, Sir Tristram of Lyones, most noble knight, from his lover and friend King Anguish of Ireland, in sore trouble and straits at Camelot. Know ye, Sir Tristram, that I have been summoned to King Arthur's court on pain of forfeiture of his lordship's royal grace, to answer a charge whereof I knew naught till I came here. Which is that by treason and felony I caused to be slain at my court in Ireland a cousin of Sir Bleobaris de Ganis and Sir Blamor de Ganis, and of this evil deed these knights do most falsely accuse me. And there is none other remedy than for me to answer them in knightly fashion, my armed body against theirs. But inasmuch as I am old, and my wasted arm could naught avail me, and in that they are of such renown and prowess that none of my knights may hope to overcome them, I pray ye, Sir Tristram, of your ancient love for me, to come to my aid and fight for me as my champion in this most cruel charge. But if ye will not, and if ye choose to remember rather that I thrust you from my court, and would not protect you against those that meant you ill, then forgive my request, and leave me to my fate and my dishonour.'
The heart of Sir Tristram lifted within him for love of the good old king, and turning, he said:
'For what day is the trial by combat which your master speaketh of?'
'For midday on the day before next Sabbath,' said the knight.
'Go ye at once to your master,' said Sir Tristram, 'and say to him that I will not fail him, but will make all speed.'