Benjamin Maxwell and Miles O'Brien in “Unfinished Business”

Both Maxwell and O'Brien sing "The Minstral Boy":

The Minstrel-Boy to the war is gone,

In the ranks of death you'll find him;

His father's sword he has girded on,

And his wild harp slung behind him.

"Land of song!" said the warrior-bard,

"Tho' all the world betrays thee,

One sword, at least, thy rights shall guard,

One faithful harp shall praise thee!"