Then lo! they heard a mighty sound which was much louder than that
which they had heard before, and when they looked round towards the
sound, they beheld a ruddy youth, without beard or whiskers, noble of
mien, and mounted on a stately courser. And from the shoulders and
the front of the knees downwards the horse was bay. And upon the man
was a dress of red satin wrought with yellow silk, and yellow were
the borders of his scarf. And such parts of his apparel and of the
trappings of his horse as were yellow, as yellow were they as the
blossom of the broom, and such as were red, were as ruddy as the
ruddiest blood in the world.

Then, behold the horseman overtook them, and he asked of Iddawc a
share of the little men that were with him. "That which is fitting
for me to grant I will grant, and thou shalt be a companion to them
as I have been." And the horseman went away. "Iddawc," inquired
Rhonabwy, "who was that horseman?" "Rhuvawn Pebyr the son of Prince
Deorthach."

And they journeyed over the plain of Argyngroeg as far as the ford of
Rhyd y Groes on the Severn. And for a mile around the ford on both
sides of the road, they saw tents and encampments, and there was the
clamour of a mighty host. And they came to the edge of the ford, and
there they beheld Arthur sitting on a flat island below the ford,
having Bedwini the Bishop on one side of him, and Gwarthegyd the son
of Kaw on the other. And a tall, auburn-haired youth stood before
him, with his sheathed sword in his hand, and clad in a coat and cap
of jet-black satin. And his face was white as ivory, and his
eyebrows black as jet, and such part of his wrist as could be seen
between his glove and his sleeve, was whiter than the lily, and
thicker than a warrior's ankle.