"The fair one was a friend of Barnes'," Wrayson answered. "It was at her flat that he called the night he was murdered." "You are sure," Duncan asked, "that the letters have not been found yet by the other side?" "Quite sure," the Baron answered. "We have agents in Mexonia, even about the King's person, and we should hear in an hour if they had the letters." "Presuming, then," Duncan said thoughtfully, "that Barnes was murdered for the sake of these letters--and as he was murdered on the very night he was going to hand them over to the other side, I don't see what else we can suppose,--the crime would appear to have been committed by some one on our side." "It certainly does seem so," the Baron admitted. "And this man Bentham! He was the agent for--the King's people. He too was murdered! Baron!" "Well?" "Who killed Barnes? He robbed me of my right, but I want to know." The Baron shook his head. "I have no idea," he said gravely. "We have agents in London, of course, but no one who would go to such lengths. I do not know who killed Barnes, nor do I know who killed Bentham." There was a short silence. The Baron's words were impressively spoken. It was impossible to doubt their veracity. Yet both to Wrayson and to Duncan they had a serious import. The same thought was present in the mind of all three of them--and each avoided the others' eyes. Wrayson, however, was not disposed to let the matter go without one more effort. The corners of his mouth tightened, and he looked the Baron steadily in the face. "Baron," he said, "I have told you that there is a man in London who has set himself to solve the mystery of Barnes' death. The two people whom he would naturally suspect are Miss Fitzmaurice and myself. There is strong presumptive evidence against us, owing to my silence at the inquest, and at any moment we might either of us have to face this charge. Knowing this, do I understand you to say that, if the necessity arose, you would be absolutely unable to throw any light upon the matter?" "Absolutely!" the Baron declared. "Both those murders are as complete an enigma to me as to you." "You have agents in London?" "Agents, yes!" the Baron declared, "but they are in the nature of detectives only. They would not dream of going to such lengths, either with instructions or without them. Neither, I am sure, would any one who was employed to collect evidence upon the other side." There was no more to be said. Wrayson rose to his feet a little abruptly. "The air is stifling here," he said. "Let us go outside and take our coffee." They found seats on the veranda, looking out upon the promenade. The Baron looked a little dubiously at the stream of people passing backwards and forwards. "Are we not a little conspicuous?" he remarked. "Does it really matter?" Wrayson asked. "It is only for this evening. I shall leave for London tomorrow, in any event. Besides, it is part of the bargain that we take coffee with these ladies. Here they are."