Betsy Andrews

In the short story The Adventure of the Dartmoor Bungalow (later, chapters 3 and 4 of The Big Four), Betsy Andrews was a servant of Jonathan Whalley and did his cooking for him at his house, "The Granite Bungalow" at Hoppator, Dartmoor. Poirot did not consider her a plausible suspect in the murder of her employer. For one thing, she was an old woman and unlikely to be strong enough to overpower Whalley. In any case, she was a local woman, well-known in the district and unlikely to have been an operative of "The Big Four".