THE ROBINSON HOUSE, FROM 8TONEWALL JACKSON'S POSITION. I THE % MAIN BATTLE-GROUND. TWO VIEWS OF THE HENRY HOUSE, FROM STONEWALL JACKSON'S POSITION. flowing south-easterly, is about half-way between Centreville and Manassas Junction, and owing to its abrupt banks, the timber with which it was fringed, and some artificial defenses at the fords, was a formidable obstacle. The stream was fordable, but all the crossings for eight miles, from Union Mills on the south to the Stone Bridge on the north, were defended by Beauregard’s forces. The Warrenton Turnpike, passing through Centreville, leads nearly due west, crossing Bull Run at the Stone Bridge. The direct road from Centreville to Manassas crosses Bull Run at Mitchell’s Ford, half a mile or so above another crossing known as Blackburn’s Ford. Union Mills was covered by Ewell’s brigade, supported after the 18th by Holmes’s brigade ; McLean’s Ford, next to the north, was covered by D. R. Jones’s brigade; Blackburn’s Ford was defended by Longstreet’s brigade, supported by Early’s brigade; Mitchell’s Ford was held by Bonham’s brigade, with an outpost of two guns and an infantry support east of Bull Run; the stream between Mitchell’s Ford and the Stone Bridge was covered by Cocke’s brigade; the Stone Bridge on the Confederate left was held by Evans with 1 regiment and Wheat’s special battalion of infantry, 1 battery of 4 guns, and two companies of cavalry. McDowell was compelled to wait at Centreville until his provision wagons arrived and he could issue rations. His orders having carried his leading division under Tyler no farther than Centreville, he wrote that officer at 8:15 A. M. on the 18th, ‘ ‘ Observe well the roads to Bull Run and to Warrenton. Do not bring on an engagement, but keep up the impression that we are moving on Manassas.” McDowell then went to the extreme left of his line to examine the country with reference to a sion (9 regiments not brigades); and Miles’s Fifth Division, containing 2 brigades (Blenker’s and Davies’s)—10 batteries of artillery, besides 2 guns attached to infantry regiments, 49 guns in all, and 7 companies of regular cavalry. Of the foregoing forces, 9 of the batteries and 8 companies of infantry were regulars, and 1 small battalion was marines. The aggregate force was about 35,000 men. Runyon’s Fourth Division was 6 or 7 miles in the rear guarding the road to Alexandria, and, though counted in the aggregate, was not embraced in McDowell’s order for battle. There was an ill-suppressed feeling of sympathy with the Confederacy in the Southern element of Washington society; but the halls of Congress resounded with the eloquence of Union speakers. Martial music filled the air, and war was the topic wherever men met. By day and night the tramp of soldiers was heard, and staff-officers and orderlies galloped through the streets between the headquarters of Generals Scott and McDowell. Northern enthusiasm was unbounded. “ On to Richmond!” was the war-cry. Public sentiment was irresistible, and in response to it the army advanced. It was a glorious spectacle. The various regiments were brilliantly uniformed according to the esthetic taste of peace, and the silken banners they flung to the breeze were unsoiled and untorn. The bitter realities of war were nearer than we knew. McDowell marched on the afternoon of July 16th, the men carrying three days’ rations in their haversacks ; provision wagons were to follow from Alexandria the next day. On the morning of the 18th his forces were concentrated at Centreville; a point about 20 miles west of the Potomac and 6 or 7 miles east of Manassas Junction. Beauregard’s outposts fell back without resistance. Bull Run, and that tlie consequences of that battle will be of the greatest importance to the country, as establishing the prestige in this contest, on the one side or the other,— the more so as the two sections will be fairly represented by regiments from almost every State, — I think it of great consequence that■, as for the most part our regiments are exceedingly raw and the best of them, with few exceptions, not over steady in line, they be organized into as many small fixed brigades as the number of regular colonels will admit, ... so that the men may have as fair a chance as the nature of things and the comparative inexperience of most will allow.” This remarkably sound report was approved, and McDowell was directed to carry his plan into effect July 8th. But the government machinery worked slowly and there was jealousy in the way, so that the troops to bring his army up to the strength agreed upon did not reach him until the 16th. Beauregard’s Army of the Potomac at Manassas consisted of the brigades of Holmes, Bonham, Ewell, D. R. Jones, Longstreet, Cocke, and Early, and of 3 regiments of infantry, 1 regiment and 3 battalions of cavalry, and 6 batteries of artillery, containing in all 27 guns, making an aggregate available force on the field of Bull Run of about 23,000 men. Johnston’s army from the Shenandoah consisted of the brigades of Jackson, Bee, Bartow, and Kirby Smith, 2 regiments of infantry not brigaded, 1 regiment of cavalry (12 companies), and 5 batteries (20 guns), making an aggregate at Bull Run of 8340. McDowell’s army consisted of 5 divisions : Tyler’s First Division, containing 4 brigades (Keyes’s, Schenck’s, W. T. Sherman’s, and Richardson’s); Hunter’s Second Division, containing 2 brigades (Andrew Porter’s and Burnside’s); Heintzelman’s Third Division, containing 3 brigades (Franklin’s, Willcox’s, and Howard’s); Runyon’s Fourth Divi- was not ordered. But the public demand for an advance became imperative — stimulated perhaps by the successful dash of fifty men of the 2d United States Cavalry, under Lieutenant C. H. Tompkins, through the enemy’s outposts at Fairfax Court House on the night of June 1st, and by the unfortunate result of the movement of a regiment under General Schenck toward Vienna, June 9th, as well as by a disaster to some of General Butler’s troops on the 10th at Big Bethel, near Fort Monroe. On the 24th of June, in compliance with verbal instructions from General Scott, McDowell submitted a “plan of operations and the composition of the force required to carry it into effect.” He estimated the Confederate force at Manassas Junction and its dependencies at 25,000 men, assumed that his movements could not be kept secret and that the enemy would call up additional forces from all quarters, and added: “If General J. E. Johnston’s force is kept engaged by Major-General Patterson, and Major-General Butler occupies the force now in his vicinity, I think they will not be able to bring up more than ten thousand men, so we may calculate upon having to do with about 35,000 men.” And as it turned out, that was about the number he “had to do with.” For the advance, McDowell asked “a force of 30,000 of all arms, with a reserve of 10,000.” He knew that Beauregard had batteries in position at several places in front of Bull Run and defensive works behind the Run and at Manassas Junction. The stream being fordable at many places, McDowell proposed in his plan of operations to turn the enemy’s position and force him out of it by seizing or threatening his communications. Nevertheless, he said in his report: “Believing the chances are greatly in favor oi the enemy’s accepting battle between this and the Junction,