With Room 13 in 1924 Edgar Wallace introduced readers to Mr. J.
This time Edgar Wallaces unassuming investigator shares the limelight with a young and vigorous ex-con called John Gray. John Gray, a moderately wealthy gentleman who was set up for having supposedly cheated riding in a horse race and sent to Dartmoor, comes out seeking vengeance on the man who sent him there and finds himself aided in his quest by the seemingly innocuous J.G.