...ecame known to be the capture of the centrifugal steam gun of Mr. Dickinson, then reported to be on its way from this city to Ellicott's Mills, over the turnpike, drawn by six mules, and in charge of Mr. Dickinson , the inventor, and two men who acted as drivers. The gun, it was said, had been taken out for trial at long range. The train reached the Mills almost simultaneously with the gun, which was quietl...