"At last the prisoner was brought in. He looked very pale, perhaps, but otherwise kept up the bearing of a high-bred gentleman. He was accompanied by his solicitor, Sir Marmaduke Ingersoll, who was evidently talking to him in quiet, reassuring tones. "Mr. Buchanan prosecuted for the Treasury, and certainly his indictment was terrific. According to him but one decision could be arrived at, namely, that the accused in the dock had, in a moment of passion, and perhaps of fear, killed the blackmailer who threatened him with disclosures which might for ever have ruined him socially, and, having committed the deed and fearing its consequences, probably realizing that the patrolling constables might catch sight of his retreating figure, he had availed himself of George Higgins's presence on the spot to loudly accuse him of the murder. "Having concluded his able speech, Mr. Buchanan called his witnesses, and the evidence, which on second hearing seemed more damning than ever, was all gone through again. "Sir Marmaduke had no question to ask of the witnesses for the prosecution; he stared at them placidly through his gold-rimmed spectacles. Then he was ready to call his own for the defence. Colonel McIntosh, R.A., was the first. He was present at the bachelors' party given by Lord Arthur the night of the murder. His evidence tended at first to corroborate that of Chipps the footman with regard to Lord Arthur's orders to show the visitor into the library, and his counter-order as soon as his wife came into the room. "'Did you not think it strange, Colonel?' asked Mr. Buchanan, 'that Lord Arthur should so suddenly have changed his mind about seeing his visitor?' "'Well, not exactly strange,' said the Colonel, a fine, manly, soldierly figure who looked curiously out of his element in the witness-box. 'I don't think that it is a very rare occurrence for racing men to have certain acquaintances whom they would not wish their wives to know anything about.' "'Then it did not strike you that Lord Arthur Skelmerton had some reason for not wishing his wife to know of that particular visitor's presence in his house?' "'I don't think that I gave the matter the slightest serious consideration,' was the Colonel's guarded reply. "Mr. Buchanan did not press the point, and allowed the witness to conclude his statements. "'I had finished my turn at bridge,' he said, 'and went out into the garden to smoke a cigar. Lord Arthur Skelmerton joined me a few minutes later, and we were sitting in the pavilion when I heard a loud and, as I thought, threatening voice from the other side of the hedge.