In the short story The Adventure of Johnnie Waverly, Tredwell was the butler of Marcus Waverly of Waverly Court, Surrey.
Tredwell had been born on the estate and had served the family for a very long time. Marcus felt that he could trust him implicitly.
Portrayals[]
Tredwell was played by Patrick Jordan in the film adaptation of the story in episode 3 of Series 1 of ITV's Agatha Christie's Poirot drama series.