Peaches Geldof feared that the 1-million-pound mansion where she died was haunted after spotting a "ghost" hand on a photo.
She posted the snap, of her and son Astala, on Instagram.
Geldof s believed it was linked to a previous occupant of the house in Wrotham, Kent, who drowned herself, the Daily Star reported.
She was so shaken that she messaged her musician husband Thomas Cohen, asking him to return home.