The Murder of Mrs. Davenport

The Murder of Mrs. Davenport is a 1928 mystery detective novel by Anthony Gilbert, the pen name of British writer Lucy Beatrice Malleson. It was the second novel featuring her amateur detective Scott Egerton.

Synopsis
Shortly before his marriage to a wealthy woman, Sir Denis Brinsley is confronted with a figure from his past. Helen Davenport arrives and offers to sell him damaging letters between them that will likely destroy his coming marriage. Shortly after he refuses, she is discovered strangled.