Finally! Found at the website of Ár nDraíocht Féin, a Druid fellowship:


THE ELEGY FOR BARDD DAFYDD

Dafydd lay dying, his harp by his side.
"Sing, brave harp, sing, though I falter," he cried.
Faint his agéd voice, but his spirit was strong.
Mountains and valleys all echo his song.

Dafydd our minstrel, we hear thy voice still.
That sweet sound lingers in valley and hill.
Thy brave heart beats with each song that we sing.
Through all the ages, that echo shall ring.