No Wind of Blame - Georgette Heyerová

Tragedy befalls the Carter family following an eventful visit from a Russian prince and a scandalous blackmail letter. The murder of Wally Carter generates a bewildering mystery - how does one shoot a man crossing a narrow bridge without being near the murder weapon when it is fired? The superlatively analytical Inspector Hemingway reveals his unnerving talent for solving a fiendish problem.