Mrs Hengrave

In the novel Sleeping Murder, Mrs Hengrave is the widow of Major Hengrave. She owned Hillside when Gwenda Reed bought it. She has relatives in Kent, and intended to move there.

BBC's Miss Marple
In the BBC 1987 adaptation of the novel, Mrs Hengrave is portrayed by Georgine Anderson. The portrayal follows the original closely but she does not get much screen time to narrate all the details of her late husband's illness and demise.