Merlin did as he said he would. And he came on the eleventh day to the city where the brothers were. He took on the likeness of one of the serving boys in the lady’s train, and so he came to the place where he found the two brothers. And he said to Uther, “Sir, my lady greets you and sends you this letter."

And Uther, to whom the letter gave great joy, took it. He truly thought that the lady had sent it to him, so he had it read to him. The letter said that he should believe what the boy had to say. And Merlin told him what he knew he would be most glad to hear. And so, on that day until the evening, he was before the king, and Uther was overjoyed.

And when evening drew near, the king was amazed at Merlin, who had promised him that he would come that day to speak with Uther. When evening had finally fallen, the two brothers talked together and said that Merlin had lied to them. But Merlin withdrew a little and took on the likeness in which he had spoken to Uther, and he came before Uther and his brother. And when the king saw him, he asked Uther whether he was the gentleman who had saved him from death, and Uther recognized him and showed him how glad he was to see him, and he spoke to him about many things.

And he said, “Sir, you have saved me from death and from much else, but I am very astonished that you should say what I did after you had left me. And my brother told me that you would come today to speak to me. He asked me, if you spoke to me, to let him know. And I am amazed that my brother should have known what you told me.”

Merlin answered, “He could not know it if someone hadn’t told him.”

The king had gone out of the pavilion, and Merlin told Uther, “Now go look for your brother and bring him here, and ask him what he said in my presence.”

And Uther went out of the tent and ordered those who were outside to take care that no one went in. As soon as he was outside, Merlin took on the likeness of the serving boy who had brought the letter. When they came back, they found the boy, and when they saw him they were greatly taken aback.

Vulgate Merlin