John Rhode 
Experiment in Crime 

Experiment in Crime first published in 1947 (published in the U.K. as Nothing but the Truth), is book no. 44 in the Dr. Priestley detective story series. Author John Rhode, a pen name of Cecil Street (1884-1964), was a prolific writer of mostly detective novels, publishing more than 140 books between 1924 and 1961. In Experiment in Crime, Henry Watlington discovers Ellers, his chauffeur, apparently drunk and unable to drive him home after dining with his attorney. The next morning, Ellers awakes along side a road, with no memory of the previous evening, and Watlington has disappeared. However, a body is soon found inside of a locked Automobile Association box by the side of the road.