Mrs. Davenport was a woman hired to work as a governess for Lord Burleigh's children. She had to contend with Mrs. Templeton who made life difficult for Janeway's character and at one point tried to kill her. Lucille was not allowed to go to certain sections of the house especially the fourth floor which was Lord Burleigh wife's room before she "died". His children proved difficult to deal with also. Lord Burleigh fell in love with her and attempted to seduce her.
Lucille Davenport appears to be based on the title character of the novel Jane Eyre by Charlotte Bronte. That character is likewise hired as a governess by a local rich man, with whom she develops a romantic relationship, and whose (allegedly deceased) wife, suffering from a severe mental illness, dwells in a forbidden section of the mansion. (citation needed • edit)