"On certain occasions, when it is absolutely necessary that I should meet them," answered Sir Henry. "They stay at the Station Hotel in Perth, coming over to Auchterarder by the last train at night and leaving by the first train in the morning from Crieff Junction. They never approach the house, for fear that servants or one or other of the guests may recognise them, but go separately along the glen and up the path to the ruins. When we thus meet, our voices can be heard through the crack in the roof of the chamber in the courtyard above. On such occasions I take good care that Stewart and his men are sent on a false alarm of poachers to another part of the estate, while I can find my way there myself with my stick," he laughed. "The Baron, I believe, acts on the same principle at his château in Hungary." "Well," declared Hamilton, "so well has the Baron kept the secret that I have never had any suspicion until this moment. By Jove! the invention of the Whispers was certainly a clever mode of preserving the secret, for nobody cares deliberately to court disaster and death, especially among a superstitious populace like the villagers here and the Hungarian peasantry." Both Gabrielle and her lover expressed their astonishment, the latter remarking how cleverly the weird legend of the Whispers invented by Sir Henry had been made to fit historical fact. * * * * * When the eight o'clock train from Stirling stopped at Auchterarder Station that evening, a tall, well-dressed man alighted, and inquired his way to the police-station. The porter knew by his accent that he was a Londoner, but did not dream that he was "a gentleman from Scotland Yard." Half an hour later, after a chat with the rural inspector, the pair went along to the cell behind the small village police-station in order that the stranger should read over to the prisoner the warrant he had brought with him from London--the application of the French police for the arrest and extradition of Felix Gerlach, _alias_ Krail, _alias_ Benoist, for the wilful murder of Edna Mary Bryant in the Forest of Pontarmé, near Chantilly. The inspector had related to the London detective the dramatic scene up at Glencardine that day, and the officer of the Criminal Investigation Department walked along to the cell much interested to see what manner of man was this, who was even more bold and ingenious in his criminal methods than many with whom his profession brought him daily into contact. He had hoped that he himself would have the credit of making the arrest, but found that the man wanted had already been apprehended on the charge of burglary at Glencardine. The inspector unlocked the door and threw it open, but next instant the startling truth became plain. Felix Krail lay dead upon the flagstones. He had taken his life by poison--probably the same poison he had placed in the wine at the fatal picnic--rather than face his accuser and bear his just punishment.