Crossing the hall they paused at a door. "Now this door and that one next to it, which is the door of Lady Wilmersley's bedroom," said the coroner, "are the only ones in this wing which communicate with the rest of the castle, and both were usually kept locked, not only at night, but during the daytime. You will please notice, my lord," continued the coroner, as they entered the library, "that both doors are fitted with an ingenious device, by means of which they can be bolted and unbolted from several seats in this room and from the divans in the swimming-bath. Only in the early morning were the housemaids admitted to these rooms; after that no one but Mustapha, Lord Wilmersley's Turkish valet, ever crossed the threshold, unless with his lordship's express permission." Twombley hurried him through the library. "You can look this room over later; I want you first to see the swimming-bath." Cyril found himself in an immense and lofty hall, constructed entirely of white marble and lighted by innumerable jewelled lamps, whose multi-coloured lights were reflected in the transparent waters of a pool, from the middle of which rose and splashed a fountain. Divans covered with soft cushions and several small tables laden with pipes, _houkahs_, cigarettes, etc., were placed at intervals around the sides of the bath. On one of the tables, Cyril noticed that two coffee-cups were still standing and by the side of a divan lay a long Turkish pipe. The floor was strewn with rare skins. A profusion of tropical plants imparted a heavy perfume to the air, which was warm and moist. Cyril blinked his eyes; he felt as if he had suddenly been transported to the palace of Aladdin. "Rum place, what?" said Twombley, looking about him with evident disfavour. "To be shut in here for three years would be enough to drive any one crazy, I say." "You will notice," said the coroner, "that the only entrance to the bath is through the library or her ladyship's bedroom. No one could have let himself down through the skylight, as it is protected by iron bars." "I see." "It was here and in the library that Lord Wilmersley spent his time, and it was here in the right-hand corner of the bath that his body was discovered this morning by one of the housemaids. The spot, as you see, is exactly opposite her ladyship's door and that door was found open, just as it stands at present. Now the housemaids swear that they always found it closed and it is their belief that his lordship used to lock her ladyship in her rooms before retiring to his own quarters for the night. At all events they were never allowed to see her ladyship or enter her apartments unless his lordship or her ladyship's maid was also present." "At about what time is Lord Wilmersley supposed to have been killed?" asked Cyril after a slight pause.