_The Times_, 15 Dec.: QUEEN SQUARE.—Yesterday, a lad about 15 years of age, who gave his name as Edward Cotton, whose dress was that of a sweep, but who was stated to be the son of a respectable tradesman in Hertfordshire, was charged with being found in the Marble hall of Buckingham Palace, under circumstances of an extraordinary nature. It should be stated that Buckingham Palace, even during the absence of the Queen, is guarded by the gentlemen porters of the establishment, two inspectors of the A division of police, and sentries from the Foot Guards. In spite of this, a number of cases have lately occurred at this office, where persons have been found in the interior of the Palace under unaccountable circumstances. George Cox, one of the porters, having been sworn, said, that at five o’clock yesterday morning he saw the prisoner in the Marble hall. The latter endeavoured to make his escape into the lobby, but he pursued him, and he then took a contrary direction, across the lawn at the back of the Palace. Witness called for the sentry at the gate, and a policeman of the B Division who was on duty in James Street, caught the lad, after a long chase over the lawn. Mr. Cox added, that he found, in the lobby, a regimental sword, a quantity of linen, and other articles, all of which had been purloined from the Palace. The sword was the property of the Hon. Augustus Murray, a gentleman attached to the Queen’s establishment. Witness went into that gentleman’s bedroom, and the bedding was covered with soot. The prisoner had, evidently, endeavoured to get up the chimney, in order to effect his escape; there was a valuable likeness of Her Majesty, in the Marble hall, which was broken, and covered with soot; and it was supposed that the lad, in the first instance, had descended from the top of the building, and had endeavoured to make his way back again in the same manner. James Stone, 31 B, deposed that he was called upon by the last witness to secure the prisoner. There were marks of soot in several of the bedchambers, as well as in one of the corridors of the Palace, and the Grand (or Marble) hall. He found upon him two letters, one addressed to Her Majesty, and the other to the Hon. Mr. Murray. These letters had been placed underneath Her Majesty’s portrait, and had, no doubt, been taken by the prisoner at the time the picture was destroyed. Part of the scabbard of the sword was discovered in one of the beds, and a quantity of bear’s grease, part of which he had placed upon his flesh, was taken from him—it belonged to one of the servants of the Palace. Upon being taken to the station house, he said he came from Hertfordshire, and that his father was a respectable man.