Shadow Over Heldon Hall — Nan Herbert

Cast out of her home after her father's sudden and mysterious death, Clarissa seeks refuge at Heldon Hall, the family's country estate. Free from her mother who always despised her, and in her beloved grandmother's charge, Clarissa begins to blossom into a beautiful and sensuous woman. And it is in these new and happy surroundings that she discovers love and new-awakened passion with Peter, a dashing and handsome young man - and nightmarish horror of haunting family secrets from the past. Her life is threatened, her sanity questioned, and all she can do is wait in anguished terror for love to destroy....The Shadow Over Heldon Hall.