The Man in the Iron Cage
From Lord Halifax's Ghost Book

Charles Lindley Wood, 2nd Viscount Halifax, was a collector of ghost stories. He assembled an extensive compilation of firsthand accounts of encounters with ghosts from all around the British Isles and abroad. The Man in the Iron Cage was one of Lord Halifax's favorites. It tells the story, from several sources, of a haunted house in Lille, France, with a gruesome secret in the attic.