The Cask - A suspicious cask arrives in London dock which when unloading slips and cracks open to reveal gold sovereigns. While the bystanders scramble to pick up the gold, the dock inspector finds a hand of a dead woman buried underneath. To his absolute bewilderment, the next day, the cask has disappeared! Now it is up to Inspector Burnley of Scotland Yard to solve the mystery of the cask as well as the murder of the woman. The Ponson Case - When the dead body of Sir William Ponson is found in a nearby river, he is presumed to have died due to drowning. But then the clues start pointing towards a gruesome murder. Now it is up to Inspector Tanner to find the owner of the mysterious footprints and prevent the estate from falling into the hands of Sir William's murderers. The Pit-Prop Syndicate - Seymour Merriman would not have even imagined that a little bit of help from strangers would catapult him into the world of crime syndicate, spanning two continents. He had only followed Lorry Number 3 in the hopes of getting some petrol for his bike. But that ended up with him noticing that the number plates had been changed! Why were the number plates changed? Who were these people whom Seymour had inadvertently met?