On The Night Express

This is a mystery novel that revolves around the stolen bullion boxes that are being conveyed by Mr. George Skidmore of the Imperial Bank of Scotland, on the Night Express Train. Catesby, an express guard slightly, yet discreetly, amused to see Mr. Skidmore glance under the seats of the first-class carriage. When the Express Train pulls up at Lydmouth, Catesby discovers that the two boxes of bullion were stolen and Skidmore murdered. Will Catesby be the prime suspect?