Bud, Bruce gives The Arethusa as a possiblity. I have that at The Arethusa (http://www.contemplator.com/folk4/arethusa.html). At the bottom of the page are links to Carolan's tune Princess Royal (which has midis of both a single line melody and a full arrangment of the tune), Bold Nelson's Praise (which also used the tune) and Napoleon's Lamentation - which is a variant.

Hopefully one of those will ring a bell.

Told you these people were great!