A woman swears revenge against a governess, whom she claims alienated the affections of her children and her husband. Be that as it may, this woman is found murdered on the titled bridge with a bullet in her head. Because a gun of the caliber of murder weapon is found in the governess's drawer, she is arrested for the murder. She finds herself in prison and Holmes and Watson are called in. They must figure out how what appears to be murder may be anything but. The bridge, itself, becomes a bit of a character in the process of unraveling the facts. I really like this story and the methodology as become a bit of a staple for future mysteries. I have to say that when this concluded, I was reminded of the type of mystery that Peter Falk's "Columbo" may have faced.