...people to know that during the past week one of our light batteries essayed an advance as an experiment, with a result that would probably be discouraging to Gen. Horace Greeley himself. Dr. F, C. Neale , of St. Marys county, Md., was arrested at his home, by Federal authority, some week or more since, and at latest accounts was still held as a prisoner. We have not learned the ground for his arres...