Dead by Now — Margaret Erskine

When Kate Cadell came from her father's modest vicarage to her grandfather's house in Victoria Square, she never dreamed she would bring to the family a terrifying reminder. Kate was the image of her great-grandmother Rosette, one of the greatest actresses of her day, and a notorious femme fatale.

The inhabitants of this huge and terrifying mansion were a strange and hostile group, desperately trying to escape the ancient curse of Julius Cadell, whose ghost was said to be restlessly seeking to avenge a wrong done him -- by Rosette, his perfidious wife!

Inspector Septimus Finch finds himself the captive audience of a ghost in a haunted theatre, where the theme of the play is murder.