Dark Masquerade — Elna Stone

DANGERFIELD
was more than a hundred years old. The house seemed rooted in the history of Florida's western coast: solid, lasting, imperishable. But the people who lived behind those walls were of different nature: brittle, inconstant, and filled with strange hatreds and dark jealousies. Meredith Ames had come to Dangerfield in the flush of new love, excited at her new marriage... but she was to find only tragedy. She disappeared at sea shortly after her arrival, presumably drowned.

And now her cousin, Laurice, had come to the old house, answering a plea from an old lady who did not want to believe that someone in her family could hate enough to murder. The hatreds of Dangerfield were strong--strong enough to threaten everyone there. Could Laurice do what Meredith had not, and survive?