"Oh, I think I know all about them. In the first instance, the house at Albert Gate had previously been tenanted by a rich banker, and it was well defended by all ordinary means against the attacks of ordinary burglars. But, in addition to this, before the diamonds left the safe at the Bank of England, the building was practically torn to pieces inside by workmen acting under the direction of the Commissioner of Police. It was absolutely impossible for anyone to enter except through the front door, unless they flew out of the second storey window. Servants and workmen, like everybody else, had to use this door alone, as the windows and doors in the basement had all been bricked up. Inside the entrance-hall there were always twelve policemen, and an inspector in charge. "Every one who left the house was searched by the inspector on duty, and Jack used to say that he was very glad he invariably insisted upon this examination, although the police were at first disinclined to meet his wishes in the matter, he being, so to speak, their direct superior for the time. Beneath the entrance-hall were rooms occupied by several Turkish and other servants. Mehemet Ali himself, in the presence of his secretaries, used to open the door leading to the suite of apartments in which the diamond cutters worked, and two of the Turkish gentlemen would remain there all day until the men left in the evening. The Envoy and both secretaries used to meet Jack when he visited the place, and for the last three weeks he had nothing to do but see the diamonds, count them, drink an excellent cup of coffee, and smoke a wonderful cigarette, made of some special Turkish tobacco, cultivated and prepared only for the Imperial household." "Ah!" sighed Brett, with a note of almost unconscious envy in his voice. He knew exactly what that coffee and those cigarettes would be like. "I beg your pardon," he went on, perceiving that Miss Talbot did not understand his exclamation. "Will you tell me as nearly as you can the occurrences of Monday evening?" "They were simple enough," said the girl. "My brother dined at home. We had one or two guests, and were all in the drawing room about 10 15, when a note came for him from Mehemet Ali. I know exactly what was in it. I looked over his shoulder whilst he read it. The words were: 'I wish to see you to-night on important business. Come, if possible, at once.' I have to tell you that it was in French, but this is an exact translation." "Your brother was quite sure that it was from Mehemet Ali himself?" said Brett. "Quite sure," was the reply. "He knew his handwriting well, having had several communications from him during the progress of the business." "Did your brother leave the house immediately?" asked Brett. "That instant. He went downstairs, put on his overcoat and hat, and got into a cab with the messenger who brought the note." "Do you know who this messenger was?" "One of the policemen on duty in the house itself."