Marcus,A wonderful song. The Planxty lyrics are in the database, just type in Jolly Beggar where it says Digitrad Lyrics Search and click go. The chords as I play them are:

Verse
G/C/D 2nd line:G/C/G/D 3rd:G/C/D 4th:G/C/G/D

Chorus
G/C/D 2nd:G/C/G/D 3rd:G/C/D

I keep my ring finger on the D note (2nd string,3rd fret) for the G and C chords. Planxty launches into a complex reel called The Wise Maid at the end of it, my partner (bodhran and lap dulcimer) and I (guitar) play Redhaired Boy/Little Beggarman at breakneck speed at the end.

Frankie