A classic Agatha Christie illustrated short story, available individually for the first time as an e-book. In one of the few Poirot short stories without Captain Hastings, the Belgian detective must face up to solving a mystery without his trusty companion. Sitting on the garden terrace of his large house on a summer evening, John Harrison is delighted to receive an unexpected visit from Hercule Poirot. The detective tells him that he is in the locality to investigate a murder but amazes Harrison by admitting that the murder has not yet been committed but that it is better to prevent one happening first.