Mrs. Buttocksthorne, often called Mrs. B, is Elspeth Marple's little Yorkshire Terrier. Mrs. B. is spoiled rotten but acts like a sweet little dog to fool everyone.
History[]
She was married to Albert Buttocksthorne for 12 years in Orange Marmalade-on-Toast-on-Thames, London, before his mysterious death. She was very distressed after he was trampled by horses.
She later moved to New Jersey with Elspeth. There, they met Seymour Schloss. Together, the three of them got a reading from Madam Pavlova to learn what they could about the death of Albert. ("Diner")