Miss Baltrout

In the novel Hickory Dickory Dock, Miss Baltrout is a an explorer who gave a dinner lecture for the residents of the hostel at Hickory Road. Poirot wanted an occasion to meet the residents in a casual manner which would not arouse their suspicions and asked the warden Mrs Hubbard if they had a practice of having guest speakers for dinner. Mrs Hubbard named Miss Baltrout as a precedent.