POLICE OFFICE, Monday, Feb. 22nd, 1835—Just as this office was closing on Saturday evening, a very gentlemanly looking man, decently dressed, calling himself Henry Preston, was brought up in the custody of the driver and guard of the Northern mail stage who charged him with an attempt to rob the mail. The accusers testified that within a short distance of Peekskill they discovered the prisoner about a hundred yards ahead of the stage, and on approaching nearer they saw him jump over a fence, evidently to avoid notice. This, of course, excited their suspicion, and they kept an eye to the mail which was deposited in the boot. In the course of a short time the guard discovered the rat nibbling at the bait, and desiring the driver not to stop the speed of the horses, he quietly let himself down and found the prisoner actively employed loosening the strap which confines the mail-bag! He was instantly arrested, placed in the carriage and carried to town free of expense. Having nothing to offer in extenuation of his offence, Mr. Henry Preston was committed to Bridewell until Monday for further investigation. POLICE OFFICE, Monday morning—This morning, Henry Preston, committed for attempting to rob the Northern Mail, was brought up before the Sitting Magistrates, when the High Sheriff of Orange county appeared and demanded the prisoner, whose real name was Henry Gibney, as a fugitive from justice? He stated that the prisoner was to have been tried for grand larceny, and was lodged in the House of Detention at Newburgh, on Thursday, under care of two persons—that in the course of the night he eluded the vigilance of his keepers, escaped from confinement, and crossed the river on the ice, and had got down as far as Peekskill where he says he attempted to get on top of the stage that he might get into New York as soon as possible. By order of the judges the prisoner was delivered up to the sheriff of Orange County, to be recognized there for his trial for the offence with which he was originally charged, at the next general session of the Supreme Court. But before the time came round he had, as on most former occasions, contrived to make his escape, and directed his course towards Upper Canada. Of the particular manner of his escape, and his adventures on his way through to Canada we can state nothing with certainty; but like all his previous movements, we may hazard the conjecture that they were such as would do the usual honor to his wretched profession. Yet, with all his tact, he could not always escape the hands of justice; and hence his course is not unfrequently interrupted, and his progress impeded by the misfortunes of the prison. It is owing to this circumstance that we are enabled to keep pace with him in Upper Canada, where we find him confined in the gaol of Toronto under the charge of burglary.