Martin - that does indeed look like the one Kate was referring to.

There came to the beach a poor exile of Erin The dew on his thin robe was heavy and chill For his country he sigh'd, when at twilight repairing To wander alone by the wind-beaten hill.

In her journal, when she and her Confederate friends were singing the sonsg of Moore and Campbell - they were feeling most alone, vulnerable and heavy at the loss of their 'country' - their world had been shattered by war. many times during the telling of her tale, Kate likened her situation to those of her Scottish ancestors and Irish cousins - as told in song and poem.

Hers is a remarkable story. For those who may have an interest, here's a bit more about the book.