"Taliessin through Logres" is the title of a collection of poems by 
Charles Williams.  It tells the the Arthurian legend as seen through the eyes of the court poet Taliessin.
Here is an extract from that collection:
The seas were left behind;
in a harbour of Logres
lightly I came to land
under a roaring wind
Strained were the golden sails, 
the masts of the galley creaked 
as it rode for the Golden Horn 
and I for the hills of Wales 
In a train of golden cars 
the Emperor went above, 
for over me in my riding 
shot seven golden stars, 
as if while the great oaks stood, 
straining, creaking around, 
seven times the golden sickle 
flashed in the Druid wood. 
Covered on my back, 
untouched, my harp had hung; 
its notes sprang to sound 
as I took the blindfold track, 
the road that runs from tales, 
through the darkness where Circe’s son 
sings to the truants of towns 
in a forest of nightingales. 
The beast ran in the wood 
that had lost the man’s mind; 
on a path harder than death 
spectral shapes stood 
propped against trees; 
they gazed as I rode by; 
fast after me poured 
the light of flooding seas.
But I was Druid-sprung; 
I cast my heart in the way; 
all the Mercy I called
to give courage to my tongue. 
As I came by Broceliande 
a diagram played in the night, 
where either the golden sickle 
flashed, or a signalling hand. 
Away on the southern seas 
was the creaking of the mast; 
beyond the Roman road 
was the creaking of the trees. 
Beyond the farms and the fallows 
the sickle of a golden arm 
that gathered fate in the forest 
in a stretched palm caught the hallows 
At the falling of the first 
chaos behind me checked; 
at the falling of the second the wood showed the worst; 
at the falling of the third 
I had come to the king’s camp; 
the harp on my back 
syllabled the signal word. 
I saw a Druid light 
burn through the Druid hills, 
as the hooves of King Arthur’s horse 
rounded me in the night. 
I heard the running of flame
faster than fast through Logres 
into the camp by the hazels I Taliessin came.
--Charles Williams