Mrs. Bucket is the wife of Mr. Bucket and operates as his partner in his private detective work. Her lodger is Mademoiselle Hortense, who is also a suspect in the case of Mr. Tulkinghorn’s murder, and whom Mr. Bucket eventually arrests. Although Mrs. Bucket’s efforts do not feature explicitly in the action of the novel, Mr. Bucket’s account of his investigation reveals Mrs. Bucket’s part in the process. It is evident that Mademoiselle Hortense has been offered a room in their house on purpose and that Mr. Bucket has used his wife to spy on the lodger, whom he correctly suspects of killing Mr. Tulkinghorn. Mrs. Bucket is, therefore, a clever and trustworthy woman who is dedicated to her husband’s career.