...dered only to maintain such positions as rested on a supported, continuous line. Gen. Scott says, to-day, that our troops had accomplished three days work, and should have rested long before. But McDowell tried to vanquish the South in a single struggle, and the sad result is before us. As it was, Capt. Alexander, with his sappers and miners, was ordered to cut through the abatis by the side of th...