Colonel Davies, who had graduated at West Point and served in the Mexican war, was prompt to recognize the importance of a point which might enable the enemy to move upon his rear. He ordered a halt, and detailed the Thirty-first New York regiment, Colonel Pratt, and the Thirty-second, Colonel Mathewson, with a detachment of artillery, to guard the road at its junction, and deployed another regiment with a section of artillery on the road, which was shaded and hedged in on both sides by a heavy growth of timber. This duty performed, the troops continued their march. Davies took his position in a wheat field with what was left of his brigade, leaving Richardson to make his own arrangements to defend the position in front of the enemy’s batteries at Blackburn’s Ford, the battle-ground of the 18th. Richardson posted his command in this place, on the road from Centreville heights to Blackburn’s Ford. The wheat field which Davies occupied contained a hill which overlooked a ravine, thickly wooded, on the opposite slope. On this hill Hunt’s battery, commanded by Lieutenant Edwards, was placed, having been exchanged from force of circumstances for Green’s battery, which belonged to Davies’ command, but was now with Richardson. The battery was supported by Davies’ own regiment, the Sixteenth New York, and the Eighteenth, Colonel Jackson. This hill commanded a broad view of the country on every side. The battle-ground of the right wing, six miles off, was in full sight. Opposite his position, across the stream, was the road which led from Bull Run to Manassas, and also to Beauregard’s extreme right. Parallel with the river to his extreme left, it was plainly traced, except where groves and clumps of trees concealed it. This road, with all the high grounds sloping from Manassas, covered with broken ridges, rich pasture lands and splendid groves, lay before the men as they placed their battery. On their rear the Centreville road stretched along a beautiful tract of country, hidden by a waving sea of luxuriant foliage. Indeed all the converging roads that threaded the vast battle-field were plainly visible from that point. Posted in this commanding position, Davies opened his demonstration with two twenty-pound rifle guns from Hunt’s battery. The first shot hurled a shell into Beauregard’s headquarters, which sent the rebels scattering in every direction. Richardson also commenced firing across the Run, producing the desired effect of keeping the enemy at their defences in the neighborhood. At ten o’clock Colonel Miles visited the command. Finding the two regiments and artillery posted at the country road, he ordered the regiments to move forward one-fourth of a mile, and the artillery to join Davies’ command, leaving the road exposed. He then sent two companies to reconnoitre the enemy’s position. They had a skirmish on the stream, at Blackburn’s Ford, and came back with little damage.