A great sensation was produced in front of the police-station house, when Mr. Thomas Laker, the superintendent of the police, had cut his throat. Mr. Laker was the act of shaving himself in a glass, suspended in a front window, when a dumb man, named Walker, came opposite, and made such an extraordinary noise, to alarm Mr. Laker, who let the razor slip, and made a most woeful incision on the left side of his neck. It will be a long lime before be is capable of doing duty, if ever.