The Hospital of Fatima (A Harlequin Romance, 1849)

Katherine was going to live in Tunisia because old Monsieur Edouard de Hallet, who had left her his estates there, had made it a condition in his will. But she had reckoned without the old man's disgruntled niece, Chantal, who could -- and did --do everything to make life unpleasant for her.