The Red Lamp — Mary Roberts Rinehart

When Jane Porter saw the ghostly outlines rising from the mist of the huge salt bog, of the great mansion of Twin Hollows emerging, she sensed that the whispered rumors about the old house were true. A musty odor of evil seemed to hang in its dimly lit rooms and winding corridors, and the spirits of those who had mysteriously died here seemed to moan with the wind from the sea.
Jane's husband had forced her to come here. Her devotion to this strangely haunted man kept her here. And as the fearful days and terrifying nights passed, she began to realize that neither she, nor the man she loved, might ever leave alive....