The Mystery of the Downs

When Harry Marsland was caught in a sudden down pour he sought shelter at Cliff Farm. Met at the door by a young woman clearly expecting someone else he is only too glad to get inside to wait out the storm. When they hear a noise upstairs in the deserted house they investigate only to discover the body of the farm's owner, Frank Lumsden, dead of a gunshot wound. Who then, killed Lumsden, and why? ...