Next morning, at the dawn of day, they arose. And they took way along the seacoast, up towards Bryn Aryen. And at the top of Cevn Clydno they equipped themselves with horses, and went towards the Castle of Arianrod. And they changed their form, and pricked towards the gate in the semblance of two youths; but the aspect of Gwydion was more staid than that of the other. "Porter," said he, "go thou in and say that there are here bards from Glamorgan."
And the porter went in.
"The welcome of Heaven be unto them. Let them in," said Arianrod.
With great joy were they greeted. And the hall was arranged, and they went to meat. When meat was ended, Arianrod discoursed with Gwydion of tales and stories. Now Gwydion was an excellent teller of tales. And when it was time to leave off feasting, a chamber was prepared for them, and they went to rest.
In the early twilight Gwydion arose, and he called unto him his magic and his power. And by the time that the day dawned, there resounded through the land uproar, and trumpets and shouts. When it was now day, they heard a knocking at the door of the chamber, and therewith Arianrod asking that it might be opened. Up rose the youth and opened unto her, and she entered, and a maiden with her. "Ah, good men," she said, "in evil plight are we."
"Yes, truly," said Gwydion, "we have heard trumpets, and shouts. What thinkest thou that they may mean?"
"Verily," said she, "we cannot see the color of the ocean by reason of all the ships side by side. And they are making for the land with all the speed they can. And what can we do?" said she.
"Lady," said Gwydion, "there is none other counsel than to close the castle upon us, and to defend it as best we may."
"Truly," said she, "may Heaven reward you. And do you defend it. And here may you have plenty of arms."
And thereupon went she forth for the arms, and behold she returned, and two maidens, and suits of armor for two men, with her.