INDIANAPOLIS, Friday, Nov. 4. HORACE HEFFRON, Deputy Grand Commander of the Order of Sons of Liberty in Indiana, who, for some weeks, has been on trial here for participation in a treasonable conspiracy, to-day turned State's evidence, and made a startling revelation of the schemes of the Order. He said nobody but Democrats had been admitted into the Order, or would be, if they applied; confirmed the previous evidence of the military organization in the order; of the appointment of a Major-General to command it. Dr. BOWLES, one of the accused, was Commander-in-Chief, with a Staff, of which Dr. JAMES...