Lucrezia Noggins
From Tardis Wiki, the free Doctor Who reference
Lady Lucrezia Noggins was a successful writer who was killed in the 1940s as a ritualistic sacrifice at Soames Towers. She returned as a ghost and helped to ferry other souls to the afterlife.
When Doris Hobbs was murdered by her husband Lucrezia helped her to pass on a message through Cassandra that Timothy Bold had nothing to do with her death. Later, Lucrezia reappeared to Cassandra and informed her that she was one of the contributors to The Horrible Book of Terror. (AUDIO: Mystery Lady)