And out of town and valley came a noise
As of a broad brook o’er a shingly bed
Brawling, or like a clamour of the rooks
At distance, ere they settle for the night....
the fortress is not merely an effective piece of decoration in the poem but part of its essential life, just as in the shoal
Of darting fish, that on a summer morn
Adown the crystal dykes at Camelot
Come slipping o’er their shadows on the sand....
and when Geraint rides
into the castle court,