Mingling with the varied emotions evoked by the capture and death of the chief criminal was a feeling of deepest exasperation that the foul assassin should after all have eluded the ignominious penalty of his crime. Thence arose a savage disposition on the part of the governing powers to wreak this baffled vengeance first, on his inanimate body; secondly, on the lives of his associates held so securely in such close custody; and thirdly, on all those in high places who might be presumed to sympathize with his deeds. It was too horrible to imagine that the ghost of the martyred Lincoln should walk unavenged. So stupendous a calamity must of necessity be the outcome of as stupendous a conspiracy, and must in the very justice of things be followed by as stupendous a retribution. A sacrifice must be offered and the victims must be forthcoming. To employ the parallel subsequently drawn by General Ewing on the trial of the conspirators: On the funeral pyre of Patroclus must be immolated the twelve Trojan captives. They were sure of Payne and of Herold. They held Arnold and O'Laughlin and Atzerodt and Spangler and Doctor Mudd--all the supposed satellites of Booth, save one. John H. Surratt could not be found. Officers in company with Weichman and Holahan, boarders at his mother's house, who in the terror of the moment had given themselves up on the morning of the fifteenth, traced him to Canada, as has already been noticed, but had there lost track of him. They had returned disappointed; and now Weichman and Holahan were in solitary confinement. Notwithstanding the large rewards out for his capture, as to him alone the all-powerful government seemed to be baffled. One consolation there was, however--if they could not find the son, they held the mother as a hostage for him, and they clung to the cruel expectation that by putting her to the torture of a trial and a sentence, they might force the son from his hiding place. In the meanwhile the Bureau of Military Justice, presided over by Judge-Advocate-General Holt, had been unceasingly at work. General Baker with his posse of soldiers and detectives scoured the country far and wide for suspected persons and witnesses, hauled them to Washington and shut them up in the prisons. Then the Bureau of Military Justice took them in hand, and, when necessary, by promises, hopes of reward and threats of punishment, squeezed out of them the testimony they wanted. Colonel Henry L. Burnett, who had become an expert in such proceedings from having recently conducted the trial of Milligan before a military tribunal at Indianapolis, was brought on to help Judge Holt in the great and good work. In the words of General Ewing in his plea for Dr. Mudd: