Scots Gaelic. The singer calls to Cairistiona, "Will you answer my cry?" After courting her, he went across the sea for years, and returns to find her dead.
Kennedy somehow fails to note the connection between his piece and that in Kennedy-Fraser (the minor difference in names seems small excuse; the tunes are rather different, but both irregular, which probably hastened the process of change), but they share lyrics and plot; I do not doubt they are the same. - RBW