O'er The River Liffey (Power of the Matchmaker)

From the Power of the Matchmaker series:

Irish heiress Caroline Fulton knows this house party, ostensibly celebrating the victory of Waterloo, is really an audition: will she make a suitable wife? Her host, an English lord, has already won over her father, who’s determined to buy a title with Caroline’s dowry. She is far from taken with the baron, however, especially once she meets Niall Doherty, the impoverished, perceptive tutor to her host’s younger brothers. He shares her love of Irish fairy tales and seems to guard a troubled past…but neither quality will earn Caroline’s father’s approval.