Mary ‘Molly’ Thynne was born in 1881, a member of the aristocracy, and related, on her mother’s side, to the painter James McNeil Whistler. She grew up in Kensington and at a young age met literary figures like Rudyard Kipling and Henry James.

Her first novel, An Uncertain Glory, was published in 1914, but she did not turn to crime fiction until The Draycott Murder Mystery, the first of six golden age mysteries she wrote and published in as many years, between 1928 and 1933. The last three of these featured Dr. Constantine, chess master and amateur sleuth par excellence.

Molly Thynne never married. She enjoyed travelling abroad, but spent most of her life in the village of Bovey Tracey, Devon, where she was finally laid to rest in 1950.