Mr Lowen

In the short story The Disappearance of Mr Davenheim, Mr Lowen was a businessman who had dealings with the banker and financier Mr Davenheim. As a speculator, Lowen had made money on several occasions at Davenheim's expense. The two were not on good terms but nevertheless dealt with each other. On the afternoon of Davenheim's disappearance, he had come to the Cedars, Davenheim's house, because he had an appointment with the banker to discuss some South American shares. When Davenheim did not show up after a long time, Lowen left. When Davenheim was declared missing, Lowen became a suspect in his disappearance. Later when a tramp "Billy Kellett" testified that he had seen Lowen throw away Davenheim's gold ring, Lowen was arrested. It would take Poirot to prove that he had been the victim of a frame up.

Portrayals
Mr Lowen was played by Tony Mathews in the film adaptation of The Disappearance of Mr Davenheim in Series 2 of ITV's Agatha Christie's Poirot. There he was given the first name "Gerald". In the adaptation, besides being a business rival of Davenheim, Gerald Lowen was also a motoring enthusiast and raced Bugattis at Brooklands.