Murder on the Great Northern Railway

April, 1867. A train departs King's Cross station bound for Lincoln. Among the passengers is a man attired in the garb of one in high ecclesiastical office. He is accompanied by a brawny man carefully carrying a large leather bag, who ensures that they are not joined by any other travellers in their first-class compartment. Back at Scotland Yard that evening, Detective Inspector Colbeck is alerted to news of a brutal murder and robbery on the train. The urgent request for help from the Bish...