The Wicked Waif by Mary Lancaster

Where there is love, there is life…
When Tillie is pulled from the stormy sea off the coast of Blackhaven, she is injured, traumatized, and remembers nothing of her previous life, not even her real name. In a frightening, unknown world she clings only to her rescuer, Major Dominic Doverton.
Dove is the quiet man of Blackhaven. Outside his regiment, no one knows of his heroism or its tragic consequences. He is at peace with his fate. Only Tillie, with her innate kindness, curiosity, and mischief breaks through his aloofness to his secret.
However, the mystery of her identity seems to be mixed up with a conspiracy to free Bonaparte from Elba and finding Tillie’s family only unleashes more danger – and threatens to separate her forever from the man she loves. Dove will take on the world to protect her, but does he have the will to fight again for his own fate?