A Daughter of Heth is a novel by eminent author William Black, first published in 3 volumes by Sampson Low in 1871.
Catherine Cassilis, known as Coquette, born in France and orphaned by the recent death of her father, comes to Airlie near Saltcoats in Southern Scotland, to live with her uncle, the Minister.
Her Catholic upbringing brings her into immediate conflict with the sternly Presbyterian household, and she quickly seeks sympathy and friendship with the more free-spirited nobleman, Lord Earlshope.
During a yachting trip around western Scotland Earlshope makes a half-hearted confession of his love to Coquette (which she reciprocates), although he is already married, but estranged from his wife.
In due course Coquette accepts the marriage proposal of her devoted cousin Tom "the Whaup", although she does not truly love him.