When the year ended the three knights met again at the fountain, two of them with their damsels; but Gawaine had lost his, and had come back much shorn of honor. Soon after they met by chance a messenger from King Arthur, who had long been seeking the banished knights, with orders to bring them back to the court.
So the three knights journeyed to Camelot, where the king received them graciously, and listened with admiration to the story of their adventures. And there, at the feast of Pentecost, came Pelleas and Nimue, true lovers plighted. Then were held high feasts and tournaments, where many noble knights splintered spears and much honor was lost and won. And here Marhaus and Pelleas bore themselves with such noble and mighty prowess, that all men vowed the glory of the tournament was theirs, and King Arthur, glad to reward such deeds of valor, made them Knights of the Table Round.
After the strange deeds and adventures that have just been described, a season of war came again to King Arthur and his realm, through which he won great honor and renown. For Lucius, the Emperor of Rome, sent ambassadors to Arthur, demanding tribute; and when he proudly refused this demand Lucius gathered a great army and invaded the tributary domains of Arthur, in Gaul.
Long and fierce was the war that followed, for Arthur crossed to Gaul with all the power of his realm; fought and killed, single-handed, a huge giant who dwelt on St. Michael's Mount; defeated the army of Rome, and killed the emperor in single combat; and in the end was crowned emperor, in the imperial city of Rome.
All this story the chronicles give at length, and tell us also that in this war the noble Lancelot du Lake, son of King Ban of Gaul, gained his first measure of renown.
After the war had ended and the victorious host returned to England, many adventures came to Lancelot, some of which we must here tell. Great indeed was the valor and might of this worthiest of knights, who in after years proved himself in knightly prowess and chivalric honor the noblest of men. In tournaments and deeds of arms, in sportive war or battle for life or death, he passed all other knights, and was never overcome but by treason or enchantment.