As a demonstration of the new sample set Wildervank (Walcker 1913) I play the Three Preludes (founded on Welsh Hymn Tunes) by Ralph Vaughan Williams. A note says that these preludes are intended to be played as a series, but can also be performed separately. They are dedicated to Alan Gray.
The third prelude is called Hyfrydol and is based on a melody by R.H. Prichard (1811 - 1887).