Darwin and Hildegarde Teilhet were American authors who sometimes worked together but sometimes worked separately. I really can’t say much more about them. Teilhet is known among Golden Age enthusiasts as the author of The Talking Sparrow Murders (which I’ve yet to read). Although written in 1934, it had a strong and unrepentant anti-Nazi stance, at a time when the Nazis’ rise to power didn’t seem like an extraordinary issue. After all, Germany had been so unstable it seemed like Hitler was just the latest in a long string of leaders.But when 1940 rolled along, times obviously changed— in September of 1939, Hitler precipitated World War II by invading Poland, and before you knew it, all of Europe was engaged in warfare. And it was in 1940 that Darwin and Hildegarde Teilhet released The Broken Face Murders, being the fourth adventure of the Baron Franz von Kaz, a comic detective in the tradition of John Dickson Carr’s Sir Henry Merrivale.