The Tragedy at Freyne

The Tragedy at Freyne is a 1927 mystery detective novel by Anthony Gilbert, the pen name of British writer Lucy Beatrice Malleson, her first novel under the pseudonym. It introduced the amateur detective Scott Egerton, who was her principal character until the creation of Arthur Crook in Murder by Experts.

Synopsis
Sir Simon Chandos is found dead in his library with a confession written in front of him and a bottle of morphia tablets by his side, it appears to be an obvious case of suicide. However one of the guests at the country house notices a slight discrepancy and launches his own amateur investigation into the death.