The presence of John H. Surratt in Washington City on the day of the assassination was proven before the Military Commission by a single witness. This witness, however, was a man who was personally acquainted with him, and who swore positively to having seen him on that day. His testimony was given about a month after the event, and the circumstance was fresh in his memory. He stated the time of the day when, and the place where, he saw him; described his dress, the kind of hat he was wearing, etc., etc. He was clear in his statements, could have had no motives for swearing falsely, and it is scarcely possible that he could have been mistaken. From the description given by Sergeant Dye of the man who acted as monitor, calling the time three times in succession at short intervals, the last time calling "Ten minutes past ten," in front of the theatre, it will be remembered that the writer came to the conclusion that this was John H. Surratt. This conclusion was verified by this same witness on the trial of Surratt. Sergeant Dye had taken a seat on the platform in front of the theatre, and just before the conclusion of the second act of the play had his attention arrested by an elegantly-dressed man, who came out of the vestibule, and commenced to converse with a ruffianly-looking fellow. Then another joined them, and the three conversed together. The one who appeared to be the the leader said, "I think he will come out now," referring, as the witness supposed, to the President. The President's carriage stood near the platform on which the witness was sitting, and one of the three passed out as far as the curbstone and looked into the carriage. It would seem that they had anticipated the possibility of his departure at the close of the second act, and had intended to assassinate him at the moment of his passing out of the door. Quite a crowd of people came out at the conclusion of the act, and Booth and his companions stood near the door, awaiting the opportunity which they sought. When most of the crowd had returned into the theatre, and the would-be assassins saw that the President would remain until the close of the play, they then began to prepare for his assassination in the theatre. The writer concludes, from a careful consideration of all the circumstances, that this was a provisional arrangement, in case their plan to murder him at the door should fail. Booth and the ruffianly-looking fellow kept their stations by the door, to make sure of not missing the opportunity of which they had planned to avail themselves, whilst the other stepped up and looked at the clock in the vestibule, and called the time. He then immediately walked rapidly up the street. He returned in a few minutes, and looking at the clock again called the time, and again walked away rapidly up the street. Very soon he returned again, and called the time louder than before, "Ten minutes past ten!" and walking rapidly away, did not return.