Found the lyrics to Calon Lan at Barry Taylor's Traditional Welsh Tunes in Midi Format site, so the midi file is also available for downloading.

http://www.islandnet.com/~btaylor/wlshmidi.htm

The midi file, but not lyrics are available there for The Maid from the Parish of Penderyn. I used to have a bookmark on another Welsh music page. I'll keep looking for that one.

Calon Lân is one of the best songs I have ever heard for putting goosebumps up & down my spine, when it is sung with harmonies and with a lot of feeling.

Calon Lân

I ask not for ease and riches
Nor earth's jewels for my part
But I have the best of wishes
For a pure and honest heart.

Chorus
Oh, pure heart so true and tender
Fairer than the lilies white
The pure heart alone can render
Songs of joy both day and night.

Should I cherish earthly treasure
It would fly on speedy wings
The pure heart a plenteous measure
Of true pleasure daily brings.

Chorus

Eve and morn my prayers ascending
To God's heaven on wings of song
Seek the joy that knows no ending
The pure heart that knows no wrong.

Chorus

Helen